| Aschner's reflex | A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. (05 Mar 2000) |
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| Aschner, Bernhard | <person> Austrian gynecologist, 1883-1960. See: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex. (05 Mar 2000) |
| Aschner-Dagnini reflex | A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. (05 Mar 2000) |
| Aschoff bodies | <pathology> Small granulomas composed of macrophages, lymphocytes and multinucleate cells grouped around eosinophilic hyaline material derived from collagen. Characteristic of the myocarditis of rheumatic fever. (18 Nov 1997) |
| Aschoff cell | A large cell component of rheumatic nodules in the myocardium with a characteristic nucleus and relatively little cytoplasm. (05 Mar 2000) |
| Aschoff nodules | <pathology> Small granulomas composed of macrophages, lymphocytes and multinucleate cells grouped around eosinophilic hyaline material derived from collagen. Characteristic of the myocarditis of rheumatic fever. (18 Nov 1997) |
| Aschoff, Karl Ludwig | <person> German pathologist, 1866-1942. See: Aschoff bodies, Aschoff nodules, node of Aschoff and Tawara, Rokitansky-Aschoff sinuses, Aschoff cell. (05 Mar 2000) |
| ascidian | <zoology> One of the Ascidioidea, or in a more general sense, one of the Tunicata. Also as an Origin: Gr. Bladder, pouch. Source: Websters Dictionary (01 Mar 1998) |
| ascidiarium | <zoology> The structure which unites together the ascidiozooids in a compound ascidian. Origin: NL. See Ascidium. Source: Websters Dictionary (01 Mar 1998) |
| ascidiform | <zoology> Shaped like an ascidian. Origin: Gr. A pouch. Source: Websters Dictionary (01 Mar 1998) |
| ascidioidea | <zoology> A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. Origin: NL, fr. Ascidium. See Ascidium. Source: Websters Dictionary (01 Mar 1998) |
| ascidiozooid | <zoology> One of the individual members of a compound ascidian. See Ascidioidea. Origin: Ascidium + zooid. Source: Websters Dictionary (01 Mar 1998) |
| ascidium | Origin: NL, fr. Ascus. See Ascus. 1. <botany> A pitcher-shaped, or flask-shaped, organ or appendage of a plant, as the leaves of the pitcher plant, or the little bladderlike traps of the bladderwort (Utricularia). 2. <zoology> A genus of simple ascidians, which formerly included most of the known species. It is sometimes used as a name for the Ascidioidea, or for all the Tunicata. Source: Websters Dictionary (01 Mar 1998) |
| ascigerous | <botany> Having asci. Origin: Ascus. Source: Websters Dictionary (01 Mar 1998) |
| ascites | <clinical sign, gastroenterology> An effusion and accumulation of serous fluid in the abdominal cavity. Synonym: abdominal dropsy, peritoneal dropsy, hydroperitonia, hydrops abdominis. Origin: L, Gr. Askites from askos = bag (18 Nov 1997) |