| cinnipirine | <chemical> An antihistaminic with considerable antiemetic properties. It is used mainly for the symptomatic treatment of nausea and vertigo accompanying meniere's disease and for the prevention and treatment of motion sickness. Pharmacological action: anti-allergic agents, antiemetics, histamine h1 antagonists. Chemical name: Piperazine, 1-(diphenylmethyl)-4-(3-phenyl-2-propenyl)- (12 Dec 1998) |
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| cinocentrum | A zone of cytoplasm containing one or two centrioles but devoid of other organelles; usually located near the nucleus of a cell. Synonym: cell centre, central body, centrosome, cinocentrum, kinocentrum, microcentrum. Origin: cyto-+ G. Kentron, centre (05 Mar 2000) |
| cinoxacin | <chemical> Synthetic antimicrobial related to oxolinic and nalidixic acids and used in urinary tract infections. Pharmacological action: anti-infective agents, quinolone. Chemical name: (1,3)Dioxolo(4,5-g)cinnoline-3-carboxylic acid, 1-ethyl-1,4-dihydro-4-oxo- (12 Dec 1998) |
| cinoxate | 2-Ethoxyethyl p-methoxycinnamate;an ultraviolet screen for topical application on the skin. (05 Mar 2000) |
| cion | Archaic term for uvula. Origin: G. Kion, pillar, the uvula (05 Mar 2000) |
| ciona intestinalis | The only species of a cosmopolitan ascidian. It is useful as a research animal. (12 Dec 1998) |
| ciprofloxacin | <drug> An oral antibiotic approved for the treatment of many common bacterial infections. Sometimes administered to treat MAC in combination with other drugs. Possible side effects include gastrointestinal upset, seizures and rash. (09 Oct 1997) |
| ciprofloxacin hydrochloride | C17H18FN3O3-HCl-H2O;a synthetic fluoroquinolone broad spectrum, antibacterial with activity against a wide range of Gram-negative and Gram-positive organisms. (05 Mar 2000) |
| cirantin | <chemistry> A glucoside found in ripe and unripe fruit (as the orange), and extracted as a white crystalline substance. See: Hesperidium. Source: Websters Dictionary (01 Mar 1998) |
| circadian | Relating to biologic variations or rhythms with a cycle of about 24 hours. Compare: infradian, ultradian. Origin: L. Circa, about, + dies, day (05 Mar 2000) |
| circadian clock | <physiology> A biological timing mechanism that controls cell synchronisation (a entire population of cells divides simultaneously). (09 Oct 1997) |
| circadian rhythm | The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs and stimuli, hormone secretion, sleeping, feeding, etc. This rhythm seems to be set by a 'biological clock' which seems to be set by recurring daylight and darkness. (12 Dec 1998) |
| Circe effect | An effect observed in enzyme catalysis in which accelerated diffusion of the substrate occurs through attractive forces of the enzyme's active site. (05 Mar 2000) |
| circellus | Synonym: circle. Origin: L. (05 Mar 2000) |
| circellus venosus hypoglossi | A small venous network around the hypoglossal nerve, connecting with the occipital sinus, inferior petrosal sinus, and internal jugular vein. Synonym: plexus venosus canalis hypoglossi, circellus venosus hypoglossi, rete canalis hypoglossi. (05 Mar 2000) |