- Ormonde, James Butler, 12th earl and 1st duke of (Irish noble)
James Butler, 12th earl and 1st duke of Ormonde was an Anglo-Irish Protestant who was the leading agent of English royal authority in Ireland during much of the period from the beginning of the English Civil Wars (1642–51) to the Glorious Revolution (1688–89). Born into the prominent Butler family,
- Ormonde, James Butler, 2nd duke of (Irish general)
James Butler, 2nd duke of Ormonde was an Irish general, one of the most powerful men in the Tory administration that governed England from 1710 to 1714. The grandson of the Irish statesman James Butler, 1st duke of Ormonde, he inherited his grandfather’s title in 1688 but deserted James II in the
- Ormonde, Piers Butler, 8th Earl of, Earl of Ossory (Irish noble)
Piers Butler, 8th earl of Ormonde was a leading member of the Butler family in Ireland; he claimed the earldom in 1515, seized the estates, and revived the Butler influence. A cousin of the 7th earl (Thomas Butler), who died without issue, Piers Butler fought for the English against the rebel Irish
- Ormonde, Piers Butler, 8th earl of, Earl Of Ossory (Irish noble)
Piers Butler, 8th earl of Ormonde was a leading member of the Butler family in Ireland; he claimed the earldom in 1515, seized the estates, and revived the Butler influence. A cousin of the 7th earl (Thomas Butler), who died without issue, Piers Butler fought for the English against the rebel Irish
- Ormonde, Thomas Butler, 10th earl of (Irish noble)
Thomas Butler, 10th earl of Ormonde was an Irish nobleman who sided with the English in the rebellions in the mid-16th century. The son of the 9th earl (James Butler), he was brought up a Protestant at the English court after his father’s death in 1546. He returned to Ireland in 1554 and was
- Ormosia (plant genus)
Fabales: Characteristic morphological features: >Ormosia species, for example, produce striking black and red seeds. These seeds have been used as currency by native peoples and in the production of beads and handbags, especially in the more tropical regions. They may be quite poisonous if eaten, however.
- Ormsby-Gore, William George Arthur, 4th Baron Harlech (British politician and scholar)
William George Arthur Ormsby-Gore, 4th Baron Harlech was a British politician and scholar who was active in promoting education in the British colonies. Educated at Eton and at New College, Oxford (1907), Ormsby-Gore was elected to Parliament in 1910. During World War I he served in Egypt, where he
- Ormskirk (England, United Kingdom)
West Lancashire: Ormskirk, an agricultural centre, preserves much of its medieval market town character. Its street market is said to date to some 700 years ago. Skelmersdale, the other centre, has experienced industrial relocation and town development and expansion since being designated a new town in 1961.…
- Ormulum (work by Orm)
Orm: …which he gave the title Ormulum, “because Orm made it.” The work (dated on linguistic evidence c. 1200) is of little literary interest but of great value to linguists, for Orm—who clearly wished to spread sound teaching, derived mainly from works of Gregory the Great, Bede, and Aelfric—invented an individual…
- Ormuz (island, Iran)
Hormuz, mostly barren, hilly island of Iran on the Strait of Hormuz, between the Persian Gulf and the Gulf of Oman, 5 miles (8 km) off the coast. The population may decline by half in summer through migration. Hormuz village is the only permanent settlement. Resources include red ochre for export.
- Ormuz, Strait of (strait, Persian Gulf)
Strait of Hormuz, channel linking the Persian Gulf (west) with the Gulf of Oman and the Arabian Sea (southeast). The strait is 35 to 60 miles (55 to 95 km) wide and separates Iran (north) from the Arabian Peninsula (south). It contains the islands of Qeshm (Qishm), Hormuz, and Hengām (Henjām) and
- ornament (architecture)
ornament, in architecture, any element added to an otherwise merely structural form, usually for purposes of decoration or embellishment. Three basic and fairly distinct categories of ornament in architecture may be recognized: mimetic, or imitative, ornament, the forms of which have certain
- ornamental (plant)
Sapindales: Anacardiaceae: …Anacardiaceae are also grown as ornamentals. Cotinus coggygria (smoke tree), from southern Europe to central China, is a shrub with purplish foliage and large diffuse inflorescences that give the “smoky” appearance. It is commonly planted in temperate regions. Several species of Rhus (sumac), particularly those from North America, are cultivated…
- Ornamental Art, Museum of (museum, London, United Kingdom)
Victoria and Albert Museum, British museum that houses what is generally regarded as the world’s greatest collection of the decorative arts. It is located in South Kensington, London, near the Science Museum and the Natural History Museum. The foundation of the museum dates from 1852, when the
- ornamental carp (fish)
koi, (Cyprinus carpio), any of more than 100 ornamental varieties of carp that are best known for their colourful body patterning and are kept as pets in indoor and outdoor freshwater ponds throughout the world. Koi were raised initially as food fishes in China and Japan. However, they also serve
- ornamental gourd (plant)
yellow-flowered gourd, (subspecies Cucurbita pepo ovifera), annual trailing vine of the gourd family (Cucurbitaceae), grown for its attractive hard-shelled fruits. The yellow-flowered gourd is native to northern Mexico and eastern North America and has long been cultivated. Some varieties produce
- ornamental horticulture
horticulture: Ornamental horticulture: Ornamental horticulture consists of floriculture and landscape horticulture. Each is concerned with growing and marketing plants and with the associated activities of flower arrangement and landscape design. The turf industry is also considered a part of ornamental horticulture. Although flowering bulbs, flower seed,…
- ornamental-fantastic style (artistic style)
Southeast Asian arts: The ornamental-fantastic style: The styles in which these variations on basic motifs are carried out vary principally according to the preponderance of the sinuous curves and spirals of the ornamental-fantastic style. This style serves as the basis for decoration and as a method of artistic phrasing.…
- ornamentation (music)
ornamentation, in music, the embellishment of a melody, either by adding notes or by modifying rhythms. In European music, ornamentation is added to an already complete composition in order to make it more pleasing. In western Europe, ornamentation varies greatly in different ages and countries.
- ornamentation (architecture)
ornamentation, in architecture, applied embellishment in various styles that is a distinguishing characteristic of buildings, furniture, and household items. Ornamentation often occurs on entablatures, columns, and the tops of buildings and around entryways and windows, especially in the form of
- Ornan the Jebusite (Jewish merchant)
Jerusalem: Ancient origins of the city: … on the threshing floor of Araunah (Ornan) the Jebusite. Thus Jerusalem became the place of the royal palace and the sacred site of a monotheistic religion.
- ornate tinamou (bird)
tinamou: Reproduction: In the ornate tinamou (Nothoprocta ornata) it is the females who perform courtship displays.
- ornate umbrellabird (bird)
umbrellabird: In the ornate umbrellabird (C. ornatus) of the Amazon basin, the wattle is short, triangular, and devoid of feathers on the hindside. In the long-wattled umbrellabird (Cephalopterus penduliger), found west of the Andes in Ecuador and Colombia, the wattle may be 28 cm (11 inches) long and…
- Orne (department, France)
Basse-Normandie: …encompassed the northwestern départements of Orne, Calvados, and Manche. The northern and western shores of the region are washed by the English Channel. In 2016 the Basse-Normandie région was joined with the région of Haute-Normandie to form the new administrative entity of Normandy.
- Orne River (river, France)
Orne River, river, Basse-Normandie région, northern France. It is 94 miles (152 km) long and flows through Orne and Calvados départements to empty into the English Channel 8 miles (13 km) north-northeast of Caen. It rises in the Perche Hills, east of the city of Sées, after which it flows
- Ornelas, Enrique (Mexican boxer)
Bernard Hopkins: …that victory with one against Enrique Ornelas in December 2009 and another against Roy Jones, Jr., in April 2010.
- Ornement hébreu, L’ (work by Günzburg)
David, Baron Günzburg: …major work on Jewish art, L’Ornement hébreu (1903; “Hebrew Ornament”). He was, in addition, an editor of the Russian Jewish encyclopaedia Yevreyskaya Entsiklopediya. Like his father and grandfather before him, Günzburg took a deep interest in the welfare of his oppressed coreligionists; he belonged to many organizations, such as the…
- Orneodidae (insect)
Lepidoptera: Annotated classification: Family Alucitidae (many-plumed moths) 130 species worldwide; each wing is very deeply cleft into 6 or more narrow plumelike divisions. Superfamily Nepticuloidea Approximately 900 species worldwide; females with one genital opening and a soft ovipositor. Family Nepticulidae (
- Ornish, Dean (American physician)
Dean Ornish is an American physician and author whose approach to treating heart disease through radical diet modification and exercise generated significant debate in the medical community and attracted a popular following. Ornish was raised in Dallas by his father, a dentist, and his mother, a
- Ornish, Dean Michael (American physician)
Dean Ornish is an American physician and author whose approach to treating heart disease through radical diet modification and exercise generated significant debate in the medical community and attracted a popular following. Ornish was raised in Dallas by his father, a dentist, and his mother, a
- Ornithes (play by Aristophanes)
Birds, drama by Aristophanes, produced in 414 bce. Some critics regard Birds as a pure fantasy, but others see it as a political satire on the imperialistic dreams that had led the Athenians to undertake their ill-fated expedition of 415 bce to conquer Syracuse in Sicily. The character
- ornithine (amino acid)
metabolism: Disposal of nitrogen: …phosphate (NH2CO―) is transferred to ornithine, an amino acid, in a reaction catalyzed by ornithine transcarbamoylase; the products are citrulline and inorganic phosphate [31]. Citrulline and aspartate formed from amino acids via step [26b] react to form argininosuccinate [32]; argininosuccinic acid synthetase catalyzes the reaction. Argininosuccinate splits into
- ornithine transcarbamoylase (enzyme)
metabolism: Disposal of nitrogen: …in a reaction catalyzed by ornithine transcarbamoylase; the products are citrulline and inorganic phosphate [31]. Citrulline and aspartate formed from amino acids via step [26b] react to form argininosuccinate [32]; argininosuccinic acid synthetase catalyzes the reaction. Argininosuccinate splits into fumarate and arginine
- ornithine transcarbamylase deficiency (pathology)
metabolic disease: Inheritance: Examples of X-linked disorders include ornithine transcarbamylase deficiency (an enzyme deficiency resulting in high blood levels of ammonia and impaired urea formation), X-linked adrenoleukodystrophy (a disorder that is characterized by progressive mental and physical deterioration and adrenal insufficiency), and Lesch-Nyhan syndrome (a disorder of purine metabolism that is characterized by…
- Ornithischia (dinosaur order)
ornithischian, any member of the large taxonomic group of herbivorous dinosaurs comprising Triceratops and all dinosaurs more closely related to it than to birds. The ornithischians (meaning “bird-hipped”) are one of the two major groups of dinosaurs, the other being the saurischians.
- ornithischian (dinosaur order)
ornithischian, any member of the large taxonomic group of herbivorous dinosaurs comprising Triceratops and all dinosaurs more closely related to it than to birds. The ornithischians (meaning “bird-hipped”) are one of the two major groups of dinosaurs, the other being the saurischians.
- ornithochory (seed dispersal)
seed: Dispersal by birds: Most ornithochores (plants with bird-dispersed seeds) have conspicuous diaspores attractive to such fruit-eating birds as thrushes, pigeons, barbets (members of the bird family Capitonidae), toucans, and hornbills (family Bucerotidae), all of which either excrete or regurgitate the hard embryo-containing part undamaged. Such diaspores
- Ornithodoros (arachnid genus)
acarid: Importance: …ticks (Argasidae) of the genus Ornithodoros. Texas cattle fever is a widespread protozoan disease transmitted by cattle ticks (Boophilus). This disease, no longer prevalent in the United States because the tick has been eliminated, remains important in many tropical and subtropical countries. Various other diseases transmitted to animals by ticks…
- Ornithogalum (plant genus)
Ornithogalum, genus of about 100 species of bulbous herbs (family Asparagaceae, formerly Hyacinthaceae) native to Eurasia and Africa. Star-of-Bethlehem (Ornithogalum umbellatum) and Arabian starflower (O. arabicum) are common garden ornamentals grown for their attractive star-shaped flowers. The
- Ornithogalum arabicum (plant)
Ornithogalum: Star-of-Bethlehem (Ornithogalum umbellatum) and Arabian starflower (O. arabicum) are common garden ornamentals grown for their attractive star-shaped flowers.
- Ornithogalum umbellatum (plant)
Ornithogalum: Star-of-Bethlehem (Ornithogalum umbellatum) and Arabian starflower (O. arabicum) are common garden ornamentals grown for their attractive star-shaped flowers.
- Ornitholestes (dinosaur genus)
Ornitholestes, (genus Ornitholestes), small, lightly built carnivorous dinosaur found as fossils from the Late Jurassic Period (about 161 million to 146 million years ago) in North America. Ornitholestes is known from a nearly complete skeleton found in Wyoming, U.S. It was about 2 metres (6.6
- Ornithology (work by Newton)
Alfred Newton: His article “Ornithology” as amended in the 11th edition is still considered a valuable source of information on the history of ornithology and bird classification.
- ornithology
ornithology, a branch of zoology dealing with the study of birds. Most of the early writings on birds are more anecdotal than scientific, but they represent a broad foundation of knowledge, including much folklore, on which later work was based. In the European Middle Ages many treatises dealt with
- Ornithomimosauria (dinosaur)
dinosaur: Tetanurae: Ornithomimids were medium-size to large theropods. Almost all of them were toothless, and apparently their jaws were covered by a horny beak; they also had very long legs and arms. A well-known example is Struthiomimus. Most were ostrich-sized and were adapted for fast running, with…
- Ornithomimus (dinosaur genus)
Ornithomimus, (genus Ornithomimus), ostrichlike feathered dinosaurs found as fossils in Mongolian, European, and North American deposits dating from 125 million to 66 million years ago during the Cretaceous Period. Ornithomimus was about 3.5 metres (11.5 feet) long, and, although it was a theropod
- Ornithonyssus sylviarum (arachnid)
mite: …include the chicken mite, the northern fowl mite, and the rat mite, all of which attack humans. In addition, there are nasal mites of dogs and birds, lung mites of monkeys, and predatory mites, which are sometimes of benefit in controlling plant-feeding mites.
- ornithophilous flower (plant)
angiosperm: Pollination: Vertebrate pollinators include birds, bats, small marsupials, and small rodents. Many bird-pollinated flowers are bright red, especially those pollinated by hummingbirds. Hummingbirds rely solely on nectar as their food source. Flowers (e.g., Fuchsia) pollinated by birds produce copious quantities of nectar but little or no odor because birds…
- ornithopod (dinosaur infraorder)
ornithopod, any member of the group of ornithischian dinosaurs characterized by a two-legged (bipedal) stance, from which the group’s name, meaning “bird-foot,” is derived. Ornithopods, along with pachycephalosaurs and ceratopsians, make up the cerapod suborder of the ornithischians. It is likely
- Ornithopoda (dinosaur infraorder)
ornithopod, any member of the group of ornithischian dinosaurs characterized by a two-legged (bipedal) stance, from which the group’s name, meaning “bird-foot,” is derived. Ornithopods, along with pachycephalosaurs and ceratopsians, make up the cerapod suborder of the ornithischians. It is likely
- ornithopter (engineering)
ornithopter, machine designed to fly by the flapping of its wings in imitation of birds. The wooden bird said to have been made about 400 bc by Archytas of Tarentum is one of the earliest examples. The Greek myth of Daedalus and Icarus involves man’s use of wings in the manner of birds. Leonardo da
- Ornithoptera victoriae (insect)
arthropod: Size range: …in width, while the butterfly Ornithoptera victoriae of the Solomon Islands has a wing span exceeding 30 centimetres (about 1 foot). One of the longest insects is the phasmid (walkingstick) Phryganistria chinensis, a specimen of which measured 62.4 centimetres (about 2 feet) in length. The phasmid Phobaeticus chani reaches a…
- Ornithorhynchidae (monotreme family)
platypus: Evolution, paleontology, and classification: The living platypus family (Ornithorhynchidae) includes the extinct genera Monotrematum (which dates to the Paleocene Epoch some 61 million years ago) and Obdurodon (which may have first emerged near the boundary of the Oligocene and Miocene epochs some 23 million years ago) and the living Ornithorhychus. The discovery of…
- Ornithorhynchus anatinus (monotreme)
platypus, (Ornithorhynchus anatinus), a small amphibious Australian mammal noted for its odd combination of primitive features and special adaptations, especially the flat, almost comical bill that early observers thought was that of a duck sewn onto the body of a mammal. Adding to its distinctive
- ornithosis (infectious disease)
psittacosis, infectious disease of worldwide distribution caused by the bacterial parasite Chlamydia psittaci and transmitted to humans from various birds. The infection has been found in about 70 different species of birds. However, the principal sources of human infection are pet birds, such as
- Ornithosuchia (reptile)
archosaur: The second archosaurian branch, the Ornithosuchia, includes birds and all archosaurs more closely related to birds than to crocodiles. In addition to the dinosaurs (the group from which birds evolved and to which they formally belong), ornithosuchians include pterosaurs and some extinct Triassic forms such as lagosuchids and lagerpetontids.
- ornithosuchian (reptile)
archosaur: The second archosaurian branch, the Ornithosuchia, includes birds and all archosaurs more closely related to birds than to crocodiles. In addition to the dinosaurs (the group from which birds evolved and to which they formally belong), ornithosuchians include pterosaurs and some extinct Triassic forms such as lagosuchids and lagerpetontids.
- ornithosuchid (reptile)
archosaur: The second archosaurian branch, the Ornithosuchia, includes birds and all archosaurs more closely related to birds than to crocodiles. In addition to the dinosaurs (the group from which birds evolved and to which they formally belong), ornithosuchians include pterosaurs and some extinct Triassic forms such as lagosuchids and lagerpetontids.
- Ornitorrinco (work by Kac)
Eduardo Kac: …began a collaborative telepresence work, Ornitorrinco (“Platypus”). It involved the remote manipulation of a robot, first by telephone signal (1989) and eventually through the use of the Internet (1994). In 1996 Kac created another telepresence work, Rara Avis, which consisted of a robotic bird with a camera inside that was…
- Ornitz, Samuel (American writer)
Hollywood Ten: …John Howard Lawson, Albert Maltz, Samuel Ornitz, Adrian Scott, and Dalton Trumbo.
- Ornstein-Uhlenbeck process (physics)
probability theory: Brownian motion process: …process V(t) is called the Ornstein-Uhlenbeck process, after the physicists Leonard Salomon Ornstein and George Eugene Uhlenbeck. The logical outgrowth of these attempts to differentiate and integrate with respect to a Brownian motion process is the Ito (named for the Japanese mathematician Itō Kiyosi) stochastic calculus, which plays an important…
- oro (game)
hide-and-seek: …Igbo children in Nigeria play oro, a combination of hide-and-seek and tag in which the seeker stands in the centre of a large circle that has been drawn in the sand and tells other players to hide. The seeker then steps out of the circle, finds, and then chases the…
- Oro y piedra (work by Martínez Estrada)
Ezequiel Martínez Estrada: His first book of poems, Oro y piedra (1918; “Gold and Stone”), was followed by Nefelibal (1922), Motivos del cielo (1924; “Heaven’s Reasons”), Argentina (1927), and Humoresca (1929). These displayed very complex techniques. Language and imagery are often tinted with humour, conveying a satirical view reminiscent of
- Oro, Ca’ d’ (building, Venice, Italy)
Venice: Palaces: …Gothic palaces, such as the Ca’ d’Oro (1425–c. 1440), the central panel extends across the whole facade and is repeated on two upper stories. In the late 15th century, Renaissance forms began to influence palace architecture, as in the Palazzo Corner, also called Ca’ Grande (c. 1533–c. 1545, designed by…
- Oro, Siglo de (Spanish literature)
Golden Age, the period of Spanish literature extending from the early 16th century to the late 17th century, generally considered the high point in Spain’s literary history. The Golden Age began with the partial political unification of Spain about 1500. Its literature is characterized by patriotic
- oro-antral fistula (anatomy)
sinus: Paranasal air sinuses: …between mouth and sinus (oro-antral fistula). The maxillary sinuses reach their maximum size by about age 12, when all the permanent teeth except the third molars have erupted. The nerves supplying the upper teeth run through the front wall of the sinus and may be irritated during acute antral…
- Orobanchaceae (plant family)
Orobanchaceae, the broomrape family of flowering plants (order Lamiales), comprising about 100 genera and some 2,300 species of parasitic plants. The largest family of parasitic plants, its members are found nearly worldwide and are especially common in Africa, Madagascar, and warm areas of the
- Orobanche (plant)
broomrape, (genus Orobanche), genus of about 150 species of parasitic annual or perennial herbs (family Orobanchaceae). A number of broomrape species are serious agricultural threats. Broomrapes produce little or no chlorophyll; instead, they draw nourishment from the roots of other plants by means
- Orobanche ramosa (plant)
broomrape: Major species: Hemp broomrape (Orobanche ramosa), also known as branched broomrape, is a noxious pest around the world and can cause significant losses if crops are heavily infested. Especially common in tomatoes, hemp broomrape can parasitize a variety of vegetable crops, and its tiny seeds are usually…
- Orobaze (Parthian ambassador)
ancient Iran: Mithradates II: …Sulla and the Parthian ambassador Orobaze. Mithradates II wisely refused to agree to follow in the Roman path and preferred to retain his neutrality in the struggle between Rome and Mithradates VI Eupator of Pontus. Rome in the west and Parthia in the east met as Alexander’s successors and, with…
- Orobie Alps (mountains, Italy)
Orobie Alps, mountains that are part of the Alpine zone of Lombardy, northern Italy, south of the Valtellina (valley of the upper Adda River). Pizzo di Coca (10,010 feet [3,052 metres]) is the highest
- Orodes I (king of Parthia)
Gotarzes I: …long afterward, however, Mithradates’ son Orodes I asserted his hereditary right against Gotarzes, and contemporary records show that by 80 bc Orodes had replaced Gotarzes.
- Orodes II (king of Parthia)
Orodes II was the king of Parthia (reigned c. 55/54–37/36 bce) who helped his brother Mithradates III murder their father, Phraates III, about 57 bce and in turn supplanted Mithradates. When Mithradates occupied Seleucia and Babylon, Orodes stormed those towns and immediately executed his brother.
- Orodes III (king of Parthia)
ancient Iran: Settlement with Rome: The short reign of Orodes III (ad 4–6/7) was followed by that of Vonones I (7/8–11), a son of Phraates IV who, because of his Roman habits, was driven out by the Parthian nobility, whose role by that time had become dominant in internal politics and dynastic questions. Vonones’…
- Oroetes (satrap of Sardis)
Polycrates: …ascendance until about 522, when Oroetes, Persian governor of Sardis, lured him to the mainland and had him crucified.
- orogen (geology)
Devonian Period: Occurrence and distribution of Devonian deposits: These fold belts may be distinguished from cratonic areas where sediments remain much as they were when formed. The main fold belts in North America are the Cordillera (western mountain ranges, including the Rocky Mountains) and the Appalachian belts to the east. In contrast, the Devonian…
- orogen (geology)
orogeny, mountain-building event, generally one that occurs in geosynclinal areas. In contrast to epeirogeny, an orogeny tends to occur during a relatively short time in linear belts and results in intensive deformation. Orogeny is usually accompanied by folding and faulting of strata, development
- orogenesis (geology)
orogeny, mountain-building event, generally one that occurs in geosynclinal areas. In contrast to epeirogeny, an orogeny tends to occur during a relatively short time in linear belts and results in intensive deformation. Orogeny is usually accompanied by folding and faulting of strata, development
- orogenic belt (geology)
Devonian Period: Occurrence and distribution of Devonian deposits: These fold belts may be distinguished from cratonic areas where sediments remain much as they were when formed. The main fold belts in North America are the Cordillera (western mountain ranges, including the Rocky Mountains) and the Appalachian belts to the east. In contrast, the Devonian…
- orogeny (geology)
orogeny, mountain-building event, generally one that occurs in geosynclinal areas. In contrast to epeirogeny, an orogeny tends to occur during a relatively short time in linear belts and results in intensive deformation. Orogeny is usually accompanied by folding and faulting of strata, development
- orographic cloud (meteorology)
climate: Cloud types: …by penetrative convection, and (4) orographic clouds formed by the ascent of air over hills and mountains.
- orographic lifting
airplane: Heavier-than-air: …caused by higher temperature) and orographic lift to climb to higher altitude and to glide for great distances. Orographic lift results from the mechanical effect of wind blowing against a terrain feature such as a cliff. The force of the wind is deflected upward by the face of the terrain,…
- orographic precipitation (meteorology)
orographic precipitation, rain, snow, or other precipitation produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge. Some also falls a
- Orohippus (fossil mammal genus)
Eohippus: Hyracotherium was succeeded by Orohippus, which differed from Hyracotherium primarily in dentition.
- Orok (people)
Amur River: History: Orok, with various Mongol and Manchu groups south of the river. From this homeland, certain Manchu tribes conquered China and established the Qing (Manchu) dynasty in China (1644–1911/12), which ruled the entire Amur basin. Although Russian explorers and traders began entering the area north of…
- Orol Dengizi (lake, Central Asia)
Aral Sea, a once-large saltwater lake of Central Asia. It straddles the boundary between Kazakhstan to the north and Uzbekistan to the south. The shallow Aral Sea was once the world’s fourth largest body of inland water. The remnants of it nestle in the climatically inhospitable heart of Central
- Orol Sea (lake, Central Asia)
Aral Sea, a once-large saltwater lake of Central Asia. It straddles the boundary between Kazakhstan to the north and Uzbekistan to the south. The shallow Aral Sea was once the world’s fourth largest body of inland water. The remnants of it nestle in the climatically inhospitable heart of Central
- orolige mannen, Den (novel by Mankell)
Henning Mankell: …in Den orolige mannen (2009; The Troubled Man). Mankell’s non-Wallander crime novels feature such characters as police officer Stefan Lindman (Danslärarens återkomst [2000; The Return of the Dancing Master]) and Judge Birgitta Roslin (Kinesen [2008; The Man from Beijing]).
- Oromo (people)
Oromo, the largest ethnolinguistic group of Ethiopia, constituting more than one-third of the population and speaking a language of the Cushitic branch of the Afro-Asiatic family. Originally confined to the southeast of the country, the Oromo migrated in waves of invasions in the 16th century ce.
- Oromo language (language)
Cushitic languages: …most widely spoken languages are Oromo (approximately 20 million speakers), Sidamo (some 3 million speakers), and Hadiyya (more than 1 million speakers) in southern Ethiopia; Somali, the official language of Somalia, with about 15 million speakers; and Saho-Afar, two closely related languages, spoken by more than 1 million people in…
- Oromo Liberation Front (Ethiopian resistance organization)
Ethiopia: Challenges to the regime: …southern Ethiopia, where the long-dormant Oromo Liberation Front (OLF) became active. By May 1991, with EPRDF forces controlling Tigray, Welo, Gonder, Gojam, and about half of Shewa, it was obvious that the army did not have sufficient morale, manpower, weapons, munitions, and leadership to stop the rebels’ advance on Addis…
- Oromo People’s Democratic Organization (poitical party, Ethiopia)
Abiy Ahmed: Entry into politics: …as a member of the Oromo People’s Democratic Organization (OPDO), which was part of the Ethiopian People’s Revolutionary Democratic Front (EPRDF) ruling coalition. In the following years he would go on to earn a master’s degree in transformational leadership (2011) from the International Leadership Institute in Addis Ababa, in partnership…
- Oron (Nigeria)
Oron, town, Akwa Ibom state, southeastern Nigeria. It lies at the mouth of the Cross River and is the terminus of roads from Uyo and Opobo. Oron is a coastal trade centre for yams, cassava (manioc), fish, and palm oil and kernels. Natural resources found in the area include oil, gas, and iron. The
- Orona (atoll, Pacific Ocean)
Phoenix Islands: Nikumaroro (Gardner), Birnie, Orona (Hull), Kanton (Canton), and Enderbury atolls. They have a total land area of approximately 11 square miles (29 square km). All are low, sandy atolls that were discovered in the 19th century by American whaling ships. Evidence on Manra, Orona, and Nikumaroro suggests that…
- Orongo (Chile)
Easter Island: Archaeology of Easter Island: …centre was the village of Orongo, on top of Rano Kao, which consisted of stone houses with roof vaults built as false arches. These houses and contiguous circular masonry dwellings with roof entrances are characteristic of the early and middle periods on the island; while unknown elsewhere in Polynesia they…
- Orono (Maine, United States)
Orono, town, Penobscot county, east-central Maine, U.S. It lies along the Penobscot River 8 miles (13 km) northeast of Bangor. Settled about 1775, it was known as Deadwater and Stillwater Plantation before it was incorporated under its present name honouring Joseph Orono, a Penobscot Indian chief
- Orono, Joseph (Penobscot chief)
Orono: …under its present name honouring Joseph Orono, a Penobscot Indian chief who befriended the settlers during the American Revolution. Mainly residential, the town is the seat of the main campus of the University of Maine (founded 1865). Light manufacturing and farming contribute to the economy. Inc. 1806. Area 18 square…
- Orontes River (river, Asia)
Orontes River, river in southwestern Asia, draining a large part of the northern Levant into the Mediterranean Sea. From its source in Al-Biqāʿ (Bekaa) Valley of central Lebanon, the river flows northward between the parallel ranges of the Lebanon and Anti-Lebanon mountains into Syria, where it has
- oronymy (linguistics)
name: Categories of names: …hydronymy; and names of mountains, oronymy. Additional terms are not generally used (though one occasionally hears words like chrematonymy—names of things).
- Oroonoko (work by Behn)
Oroonoko, novel by Aphra Behn, published in 1688. Behn’s experiences in the Dutch colony of Surinam in South America provided the plot and the locale for this acclaimed novel about a proud, virtuous African prince who is enslaved and cruelly treated by “civilized” white Christians. A prince in his