| dRVVT | dilute Russell viper venom time |
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| RV | random variable; rat virus; Rauscher virus; rectovaginal; reinforcement value; renal vein; residual ... |
| RVV | right ventricular volume; rubella vaccine-like virus; Russell viper venom |
| RVVT | Russell viper venom time |
| VRV | ventricular residual volume; viper retrovirus |
| DRVVT | Dilute Russel Viper Venom Time |
|---|---|
| RVV | Russel Viper Venom |
| viper | 1. <zoology> Any one of numerous species of Old World venomous makes belonging to Vipera, Clotho, Daboia, and other genera of the family Viperidae. "There came a viper out of the heat, and fastened on his hand." (Acts xxviii. 3) Among the best-known species are the European adder (Pelias berus), the European asp (Vipera aspis), the African horned viper (V. Cerastes), and the Indian viper (Daboia Russellii). 2. A dangerous, treacherous, or malignant person. "Who committed To such a viper his most sacred trust Of secrecy." (Milton) Horned viper. <zoology> A small, slender, phosphorescent deep-sea fish (Chauliodus Sloanii). It has long ventral and dorsal fins, a large mouth, and very long, sharp teeth. <botany> Viper's bugloss, a perennial composite herb (Scorzonera Hispanica) with narrow, entire leaves, and solitary heads of yellow flowers. The long, white, carrot-shaped roots are used for food in Spain and some other countries. Synonym: viper grass. Origin: F. Vipere, L. Vipera, probably contr. Fr. Vivipera; vivus alive + parere to bring forth, because it was believed to be the only serpent that brings forth living young. Cf. Quick, Parent, Viviparous, Wivern, Weever. Source: Websters Dictionary (01 Mar 1998) |
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| viper venoms | Venoms from snakes of the viperid family. They tend to be less toxic than elapid or hydrophid venoms and act mainly on the vascular system, interfering with coagulation and capillary membrane integrity and are highly cytotoxic. They contain large amounts of several enzymes, other factors, and some toxins. (12 Dec 1998) |
| russell's viper | A genus of snakes of the family viperidae. It is distributed in west pakistan, most of india, burma, ceylon, thailand, southeast china, taiwan, and a few islands of indonesia. It hisses loudly when disturbed and strikes with great force and speed. Very prolific, it gives birth to 20-60 young. This viper is the leading cause of snakebite in india and burma. (moore: poisonous snakes of the world, 1980, p127) (12 Dec 1998) |
| Russell's viper venom | A venom used as a coagulant in the arrest of haemorrhage from accessible sites in haemophilia. (05 Mar 2000) |
| Russell's viper venom clotting time | A clotting time determination performed on citrated platelet-poor plasma using Russell's viper venom as an activating agent. This allows activation of factor X directly without the need for other coagulation factors and is used to confirm factor X defects. See: Stypven time test. (05 Mar 2000) |
| water viper | <zoology> See Water moccasin. Source: Websters Dictionary (01 Mar 1998) |
| brain sand | Small calcareous concretions in the stroma of the pineal and other central nervous system tissues. Synonym: acervulus, brain sand, psammoma bodies. (05 Mar 2000) |
| sand | Particles in siliciclastic sediment that range in size from 0.0625 millimetres (very fine-grained sand) to 2.0 millimetres (very coarse-grained sand), according to the Udden-Wentworth scale. In field geology, to tell the difference between fine-grained sand and coarse silt, the particle in a rock is sand if it can be clearly seen with the naked eye. (09 Oct 1997) |
| sand bath | In chemistry, an arrangement whereby a substance to be treated is in a vessel protected from the direct action of fire by a layer of sand. (05 Mar 2000) |
| sand bodies | Mineralised body's occurring in the meninges, choroid plexus, and in certain meningiomas; composed usually of a central capillary surrounded by concentric whorls of meningocytes in various stages of hyaline change and mineralization; can also occur in benign and malignant epithelial tumours (often papillary) or with chronic inflammation. Synonym: sand bodies. Synonym: corpora arenacea. Synonym: calcospherite. (05 Mar 2000) |
| sand-crack | A crack or fissure in the hoof of the horse, occurring usually on the inside of the forefoot (quarter-crack) or in the forepart of the hindfoot (toe-crack); when the crack is deep enough to expose the sensitive laminae, or when it extends to the coronary band, lameness results. (05 Mar 2000) |
| sand tumour | <tumour> A firm cellular neoplasm derived from fibrous tissue of the meninges, choroid plexus, and certain other structures associated with the brain, characterised by the formation of multiple, discrete, concentrically laminated, calcareous bodies (psammoma bodies); most of these neoplasms are histologically benign, but may lead to severe symptoms as a result of compressing the brain. Synonym: angiolithic sarcoma, sand tumour, Virchow's psammoma. (05 Mar 2000) |
| hydatid sand | The scoleces of Echinococcus tapeworms in the fluid within a primary or daughter hydatid cyst. (05 Mar 2000) |
| intestinal sand | Minute calculi or gritty material occurring in faeces, composed of soaps, bile pigment, cholesterol, magnesium salts, succinic acid, etc. (05 Mar 2000) |
| urinary sand | Multiple small calculous particles passed in the urine of patients with nephrolithiasis; each particle is usually too small to cause significant symptoms or to be identified as a true calculus. (05 Mar 2000) |
| sand viper |
horned viper: highly venomous viper of northern Africa and southwestern Asia having a horny spine above each eye hognose snake: harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
Ãâó: wordnet.princeton.edu/perl/webwn
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| sand viper | harmless North American snake with upturned nose |
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| sand viper | highly venomous viper of North Africa and southwest Asia having a horny spine above each eye |
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