| omagra | <medicine> Gout in the shoulder. Origin: NL, fr. Gr. Shoulder + seizure. Source: Websters Dictionary (01 Mar 1998) |
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| omahas | <ethnology> A tribe of Indians who inhabited the south side of the Missouri River. They are now partly civilized and occupy a reservation in Nebraska. Source: Websters Dictionary (01 Mar 1998) |
| oman | A sultanate on the southeast coast of the arabian peninsula. Its capital is masqat. Before the 16th century it was ruled by independent emirs but was captured and controlled by the portuguese 1508-1648. In 1741 it was recovered by a descendent of yemen's imam. After its decline in the 19th century, it became virtually a political and economic dependency within the british government of india, retaining close ties with great britain by treaty from 1939 to 1970 when it achieved autonomy. The name was recorded by pliny in the 1st century a.d. As omana, said to be derived from the founder of the state, oman ben ibrahim al-khalil. (12 Dec 1998) |
| omander wood | <botany> The wood of Diospyros ebenaster, a kind of ebony found in Ceylon. Origin: Etymol. Uncertain. Source: Websters Dictionary (01 Mar 1998) |
| omasitis | Inflammation of the omasum. (05 Mar 2000) |
| omasum | <anatomy> The third division of the stomach of ruminants. See Manyplies, and Illust. Under Ruminant. Origin: L. Source: Websters Dictionary (01 Mar 1998) |
| ombre | A game at cards, borrowed from the Spaniards, and usually played by three persons. "When ombre calls, his hand and heart are free, And, joined to two, he fails not to make three." (Young) Origin: F. Hombre, fr. Sp. Hombre, lit, a man, fr. L. Homo. See Human. <zoology> A large Mediterranean food fish (Umbrina cirrhosa): Synonym: umbra, and umbrine. Origin: F, of uncertain origin. Source: Websters Dictionary (01 Mar 1998) |
| Ombredanne | Louis, French surgeon, 1871-1956. See: Ombredanne operation. (05 Mar 2000) |
| Ombredanne operation | A technique whereby the mobilised testis is brought down into the scrotum and through the scrotal septum, to be affixed to the tissues in the contralateral scrotal pouch. Synonym: transseptal orchiopexy. (05 Mar 2000) |
| ombrometer | <meteorology> An instrument for measuring the rain that falls; a rain gauge. Origin: Gr. Rain: cf. F. Ombrometre. Source: Websters Dictionary (01 Mar 1998) |
| ombrophobia | <psychology> Morbid fear of rain. Origin: G. Ombros, rainstorm, + phobos, fear (05 Mar 2000) |
| omega | 1. Twenty-fourth and last letter of the Greek alphabet, omega. 2. Symbol for Ohm. (05 Mar 2000) |
| omega 3 fatty acids | A class of fatty acids that have a double bond three carbons from the methyl moiety; reportedly, they play a role in lowering cholesterol and LDL levels. Synonym: omega-3 fatty acids. (05 Mar 2000) |
| omega-3 fatty acid desaturase | <enzyme> Catalyses desaturation of the omega-3 carbon (3rd from free end) of c-18 fatty acids; deficiency results in accumulation of linoleic acid (18:2omega6,9) at the expense of linolenic acid (18:3omega3,6,9); amino acid sequence given in first source Registry number: EC 1.14.99.- Synonym: fad3 gene product, omega-3 desaturase (26 Jun 1999) |
| omega-6 desaturase | <enzyme> Catalyses desaturation at omega-6 carbon (sixth carbon from free end) Registry number: EC 1.44.99.- Synonym: fad6 gene product, fadc gene product, fad2-1 gene product, fad2-2 gene product (26 Jun 1999) |