| tetra- | 1. <prefix> A combining form or prefix signifying four, as in tetrabasic, tetrapetalous. 2. <chemistry> A combining form (also used adjectively) denoting four proportional or combining parts of the substance or ingredient denoted by the term to which it is prefixed, as in tetra-chloride, tetroxide. Origin: Gr, from, four. (29 Oct 1998) |
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| tetra-amelia | Absence of upper and lower limbs. Origin: tetra-+ G. A-priv. + melos, limb (05 Mar 2000) |
| tetrabasic | <chemistry> Capable of neutralising four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic; said of certain acids; thus, normal silicic acid, Si(OH)4, is a tetrabasic acid. Origin: Tetra- + basic. Source: Websters Dictionary (01 Mar 1998) |
| tetrabenazine | <chemical> A drug formerly used as an antipsychotic but now used primarily in the treatment of various movement disorders including tardive dyskinesia. Tetrabenazine blocks uptake into adrenergic storage vesicles and has been used as a high affinity label for the vesicle transport system. Pharmacological action: adrenergic uptake inhibitors, affinity labels, anti-dyskinesia agents. Chemical name: 2H-Benzo(a)quinolizin-2-one, 1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)- (12 Dec 1998) |
| tetraboric | <chemistry> Same as Pyroboric. Origin: Tetra- + boric. Source: Websters Dictionary (01 Mar 1998) |
| tetraboric acid | Perboric or pyroboric acid. Synonym: pyroboric acid. (05 Mar 2000) |
| tetrabrachius | An individual with four arms. Origin: tetra-+ G. Brachion, arm (05 Mar 2000) |
| tetrabranchiata | <zoology> An order of Cephalopoda having four gills. Among living species it includes only the pearly nautilus. Numerous genera and species are found in the fossil state, such as Ammonites, Baculites, Orthoceras, etc. Origin: NL. See Tetra-, and Branchia. Source: Websters Dictionary (01 Mar 1998) |
| tetrabranchiate | <zoology> Of or pertaining to the Tetrabranchiata. One of the Tetrabranchiata. Origin: Tetra + branchiate. Source: Websters Dictionary (01 Mar 1998) |
| tetrabromophenolphthalein sodium | The sodium salt of a brominated dye; it was used early in the development of cholecystography. (05 Mar 2000) |
| tetracaine | <drug> Potent local anaesthetic. (18 Nov 1997) |
| tetracaine hydrochloride | 2-(Dimethylamino)ethyl p-(butylamino)benzoate monohydrochloride;a highly potent local anaesthetic used for spinal, nerve block, and topical anaesthesia. (05 Mar 2000) |
| tetracarpel | <botany> Composed of four carpels. Origin: Tetra- + carpellary. Source: Websters Dictionary (01 Mar 1998) |
| tetracenomycin F1 monooxygenase | <enzyme> Catalyses the oxidation of naphthacenone tcm f1 to the 5,12-naphthaquinone tcm d3 in the biosynthesis of tcm c in streptomyces glaucescens; requires only oxygen for enzymatic oxidation; inactivated by p-chloromercuribenzoic acid, n-ethylmaleimide and diethyl pyrocarbonate Registry number: EC 1.14.99.- Synonym: tcm f1 monooxygenase, tcmh protein (26 Jun 1999) |
| tetracenomycin F2 cyclase | <enzyme> Catalyses the cyclization of the anthrone tcmf2 to the naphthacenone tcmf1 in the biosynthesis of antibiotic tcm c in streptomyces glaucescens by an intramolecular aldol condensation-dehydration Registry number: EC 4.1.2.- Synonym: tcmi protein (26 Jun 1999) |