| cyclooxygenase inhibitor | <pharmacology> Compounds or agents that combine with cyclooxygenase (prostaglandin-endoperoxide synthase) and thereby prevent its substrate-enzyme combination with arachidonic acid and the formation of eicosanoids, prostaglandins, and thromboxanes. (08 Mar 2000) |
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| cycloparaffins | Alicyclic hydrocarbons in which three or more of the carbon atoms in each molecule are united in a ring structure and each of the ring carbon atoms is joined to two hydrogen atoms or alkyl groups. The simplest members are cyclopropane (c3h6), cyclobutane (c4h8), cyclohexane (c6h12), and derivatives of these such as methylcyclohexane (c6h11ch3). (12 Dec 1998) |
| cyclopea | A congenital defect in which the two orbits merge to form a single cavity containing one eye, its origin evidenced by fusion of the right and left optic primordia, and in which the nose is absent; usually combined with cyclencephaly. Synonym: cyclopea, synophthalmia, synophthalmus. Origin: G. Kyklops, fr. Kyklos, circle, + ops, eye (05 Mar 2000) |
| cyclopean | Denoting or relating to cyclopia. Synonym: cyclopean. (05 Mar 2000) |
| cyclopenta phenanthrene | <chemical> Phenanthrene, to the a side of which a three-carbon fragment is fused; as the perhydro (saturated) derivative, it is the basic structure of the steroids. (05 Mar 2000) |
| cyclopentamine hydrochloride | <chemical> A sympathomimetic amine, similar in action to ephedrine. Chemical name: N,alpha-dimethylcyclopentaneethylamine hydrochloride; 1-cyclopentyl-2-methylaminopropane hydrochloride (05 Mar 2000) |
| cyclopentane | <chemical> A closed ring alicyclic hydrocarbon containing five carbon atoms, isomeric with pentene. (05 Mar 2000) |
| cyclopentanone monooxygenase | <enzyme> From pseudomonas ncimb 9872; catalyses the conversion of cyclopentanone to 5-valerolactone in the presence of NADPH and oxygen Registry number: EC 1.14.13.16 Synonym: cyclopentanone 1,2-monooxygenase (26 Jun 1999) |
| cyclopentaphene | 1,1-cyclopentanedimethanol dicarbanilate;a tranquilliser with antispasmodic properties. Synonym: cyclopentaphene. (05 Mar 2000) |
| cyclopenthiazide | <chemical> Thiazide diuretic also used as an antihypertensive agent. Pharmacological action: antihypertensive agents, diuretics, thiazide. Chemical name: 2H-1,2,4-Benzothiadiazine-7-sulfonamide, 6-chloro-3-(cyclopentylmethyl)-3,4-dihydro-, 1,1-dioxide (12 Dec 1998) |
| cyclopentolate | <chemical> A parasympatholytic anticholinergic used solely to obtain mydriasis or cycloplegia. Pharmacological action: muscarinic antagonists, mydriatics, parasympatholytics. Chemical name: Benzeneacetic acid, alpha-(1-hydroxycyclopentyl)-, 2-(dimethylamino)ethyl ester (12 Dec 1998) |
| cyclopentolate hydrochloride | <drug> An anticholinergic, spasmolytic drug, used in refraction determinations. It causes cycloplegia and mydriasis; an atropine-like agent with brief duration of action. Chemical name: 2-(Dimethylamino)ethyl-1-hydroxy-alpha-phenylcyclopentaneacetate hydrochloride (05 Mar 2000) |
| cyclopeptide | <chemistry> A polypeptide lacking terminal -NH2 and -COOH groups by virtue of their combination to form another peptide link, forming a ring. (05 Mar 2000) |
| cyclopeptide synthetase | <enzyme> Key enzyme system of benzodiazepine alkaloid synthesis in penicillium cyclopium; forms cyclo(anthranoyl-phenylalanyl) from anthranilic acid, l-phenylalanine, the methyl group of l-methionine and ATP. Registry number: EC 6.3.2.- (26 Jun 1999) |
| cyclophenazine hydrochloride | <drug> A tranquillising drug. Chemical name: 10-[3-(4-Cyclopropyl-1-piperazinyl)propyl]-2-(trifluoromethyl)phenothiazine dihydrochloride (05 Mar 2000) |