| rive | To rend asunder by force; to split; to cleave; as, to rive timber for rails or shingles. "I shall ryve him through the sides twain." (Chaucer) "The scolding winds have rived the knotty oaks." (Shak) "Brutus hath rived my heart." (Shak) Origin: Icel. Rifa, akin to Sw. Rifva to pull asunder, burst, tear, Dan. Rive to rake, pluck, tear. Cf. Reef of land, Rifle a gun, Rift, Rivel. Source: Websters Dictionary (01 Mar 1998) |
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| Rivea corymbosa | Mexican bindweed, a plant of the family Convolvulaceae, the seeds of which were used in ceremonies by Aztec Indians in Mexico and contain lysergic acid amide, isolysergic acid, lysergic acid monoethylamide, chanoclavine, and other indole alkaloids; several hundred seeds must be ingested to produce hallucinatory and euphoric effects. Synonym: morning glory. (05 Mar 2000) |
| rivel | To contract into wrinkles; to shrivel; to shrink; as, riveled fruit; riveled flowers. "Riveled parchments." . Origin: AS. Gerifled, geriflod, gerifod, wrinkled, geriflian, gerifian, to wrinkle. See Rifle a gun, Rive. Source: Websters Dictionary (01 Mar 1998) |
| river | 1. <ecology> A large stream of water flowing in a bed or channel and emptying into the ocean, a sea, a lake, or another stream; a stream larger than a rivulet or brook. "Transparent and sparkling rivers, from which it is delightful to drink as they flow." (Macaulay) 2. A large stream; copious flow; abundance; as, rivers of blood; rivers of oil. River chub, any one of numerous fresh water tortoises inhabiting rivers, especially those of the genus Trionyx and allied genera. See Trionyx. Origin: F. Rivere a river, LL. Riparia river, bank of a river, fr. L. Riparius belonging to a bank or shore, fr. Ripa a bank or shore; of uncertain origin. Cf. Arrive, Riparian. Source: Websters Dictionary (01 Mar 1998) |
| river blindness | Ocular complications, such as keratitis, iridocyclitis, or retrobulbar neuritis, caused by the microfilariae of Onchocerca volvulus. Synonym: river blindness. (05 Mar 2000) |
| river-type fish | <marine biology> Anadromous fish that rear for a year or more in rivers. (23 Aug 1998) |
| Rivero-Carvallo effect | Inspiratory increase in the systolic murmur of tricuspid insufficiency; the characteristic distinguishing tricuspid insufficiency from mitral insufficiency. (05 Mar 2000) |
| Rivero-Carvallo, Jose Manuel | <person> Mexican cardiologist, *1905. See: Carvallo's sign, Rivero-Carvallo effect. (05 Mar 2000) |
| Rivers' cocktail | An intravenous slow injection of from 1000 to 2000 ml of 10% dextrose in isotonic saline to which thiamine hydrochloride and 25 units of insulin are added; used in acute alcoholism. Synonym: Philadelphia cocktail. (05 Mar 2000) |
| Rivers, William | <person> English physician, 1864-1922. See: Rivers' cocktail. (05 Mar 2000) |