| ASC | acetylsulfanilyl chloride; altered state of consciousness; ambulatory surgical center; American Soci... |
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| ASI | addiction severity index; anxiety state inventory; anxiety status inventory; arthroscopic screw inst... |
| ASTHO | Association of State and Territorial Health Officers |
| ATS | Achard-Thiers syndrome; acid test solution; alpha-D-tocopherol acid succinate; American Thoracic Soc... |
| CES | carboxylesterase; cauda equina syndrome; cat's eye syndrome; central excitatory state; chronic elect... |
| black vomit | <medicine> A copious vomiting of dark-coloured matter; or the substance so discharged; one of the most fatal symptoms in yellow fever. Source: Websters Dictionary (01 Mar 1998) |
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| black water | azoturia of horses |
| black widow spider | A venomous new world spider with an hourglass-shaped red mark on the abdomen. (12 Dec 1998) |
| black widow spider venom | Potent neurotoxin that induces catastrophic release of acetylcholine from presynaptic terminals of cholinergic chemical synapses. (18 Nov 1997) |
| bone black | Charcoal produced by incomplete combustion of animal tissues, especially bone. Synonym: animal black, bone black, bone charcoal. (05 Mar 2000) |
| Bouffardi's black mycetoma | <dermatology> An obsolete term for a chronic infection, usually involving the feet. See: mycetoma. (05 Mar 2000) |
| Carter's black mycetoma | Mycetoma caused by Madurella mycetomatis which is prevalent in Italy, parts of Africa, and India; the exuded granules are black. (05 Mar 2000) |
| chlorazol black E | <chemical> An acid dye, used as a fat and general tissue stain, and to stain protozoa in faecal smears or in tissues. Structure: C34H25N9O7S2Na2 (05 Mar 2000) |
| plague, black | In the 14th century the victims of the black plague had bleeding below the skin (subcutaneous haemorrhage) which made darkened ( blackened ) their bodies. (12 Dec 1998) |
| Sudan black B | A diazo dye, C29H24N6, used as a stain for fats. (05 Mar 2000) |
| death, black | The black plague or the plague. In 14th century Europe, the victims of the black plague had bleeding below the skin (subcutaneous haemorrhage) which made darkened ( blackened ) their bodies. The black death swept recurrently through Europe, killing half its population in the middle of the 14th century. (12 Dec 1998) |
| Fuchs' black spot | An area of pigment proliferation in the macular region in degenerative myopia. (05 Mar 2000) |