| 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) |
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| crack | A fissure or fracture. Caused by the effects of stress on weak or weakened parts of a material. To break a large, complex compound into simpler compounds. To open something slightly. A narcotic drug illegal in most countries which is a cheaper, more addictive, smokeable version of cocaine (another illegal narcotic) with more adverse effects on the user than cocaine. (09 Oct 1997) |
| crack cocaine | The purified, alkaloidal, extra-potent form of cocaine. It is smoked (free-based), injected intravenously, and orally ingested. Use of crack results in alterations in function of the cardiovascular system, the autonomic nervous system, the central nervous system, and the gastrointestinal system. There are concomitant psychological and social alterations as well. The slang term "crack" was derived from the crackling sound made upon igniting of this form of cocaine for smoking. (12 Dec 1998) |
| quarter-crack | See: sand-crack. (05 Mar 2000) |
| toe-crack | See: sand-crack. (05 Mar 2000) |
| 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 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 crack |
a fissure in the wall of a horse's hoof often causing lameness
Ãâó: wordnet.princeton.edu/perl/webwn
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| sand crack |
a crack originating at the ground level in a horse's hoof, sometimes causing lameness. Two types are the quarter c. and the toe c. Called also hoof wall c.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| sand crack | a fissure in the wall of a horse's hoof often causing lameness |
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