| tetraethyl lead | Pb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. Synonym: lead tetraethyl. (05 Mar 2000) Previous: tetraethylammonium, tetraethylammonium chloride, tetraethylammonium ionNext: tetraethyl lead, tetraethylmonothionopyrophosphatetetraethyl lead <chemical> Tetraethylplumbane. A highly toxic compound used as a gasoline additive. It causes acute toxic psychosis or chronic poisoning if inhaled or absorbed through the skin. Chemical name: Plumbane, tetraethyl- (12 Dec 1998) |
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| tetraethyl poisoning | Pb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. Synonym: lead tetraethyl. (05 Mar 2000) Previous: tetraethylammonium, tetraethylammonium chloride, tetraethylammonium ionNext: tetraethyl lead, tetraethylmonothionopyrophosphatetetraethyl poisoning -->tetraethyl lead <chemical> Tetraethylplumbane. A highly toxic compound used as a gasoline additive. It causes acute toxic psychosis or chronic poisoning if inhaled or absorbed through the skin. Chemical name: Plumbane, tetraethyl- (12 Dec 1998) |
| tetraethyl pyrophosphate | Et4P2O7; [(EtO)2PO]2O;an organic phosphoric compound used as an insecticide; a potent irreversible cholinesterase inhibitor. Acronym: TEPP (05 Mar 2000) |
| tetraethylammonium | A potassium-selective ion channel blocker. (12 Dec 1998) |
| tetraethylammonium chloride | (C2H5)4N+C l-;a quaternary ammonium compound that partially blocks transmission of impulses through parasympathetic and sympathetic ganglia; its clinical usefulness is limited; formerly used as an antihypertensive drug. (05 Mar 2000) |
| tetraethylammonium ion | A monovalent cation widely used in neurophysiology as a specific blocker of potassium channels. It is similar in size to the hydrated potassium ion and gets stuck (reversibly) in the channels. (18 Nov 1997) |
| tetraethyllead | Pb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. Synonym: lead tetraethyl. (05 Mar 2000) Previous: tetraethylammonium, tetraethylammonium chloride, tetraethylammonium ionNext: tetraethyl lead, tetraethylmonothionopyrophosphatetetraethyl lead <chemical> Tetraethylplumbane. A highly toxic compound used as a gasoline additive. It causes acute toxic psychosis or chronic poisoning if inhaled or absorbed through the skin. Chemical name: Plumbane, tetraethyl- (12 Dec 1998) |
| tetraethylmonothionopyrophosphate | An anticholinesterase agent used in the treatment of glaucoma. (05 Mar 2000) |
| tetraethylthiuram disulfide | <chemical> A carbamate derivative used as an alcohol deterrent. It is a relatively nontoxic substance when administered alone, but markedly alters the intermediary metabolism of alcohol. When alcohol is ingested after administration of disulfiram, blood acetaldehyde concentrations are increased, followed by flushing, systemic vasodilation, respiratory difficulties, nausea, hypotension, and other symptoms (acetaldehyde syndrome). The intensity and duration of symptoms vary greatly from individual to individual. Pharmacological action: alcohol deterrents. Chemical name: Thioperoxydicarbonic diamide (((H2N)C(S))2S2), tetraethyl- (12 Dec 1998) |
| tetragastrin | <chemical> L-tryptophyl-l-methionyl-l-aspartyl-l-phenylalaninamide. The c-terminal tetrapeptide of gastrin. It is the smallest peptide fragment of gastrin which has the same physiological and pharmacological activity as gastrin. Chemical name: L-Phenylalaninamide, L-tryptophyl-L-methionyl-L-alpha-aspartyl- (12 Dec 1998) |
| tetraglycine hydroperiodide | (NH2CH2COOH)4HI-11/4I2;dissolves in water to the extent of 380 g per liter; used for the emergency disinfection of drinking water in amounts to yield 8 p.p.m. Of active iodine. (05 Mar 2000) |
| tetragon | 1. <geometry> A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc. 2. <astronomy> An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle. Origin: L. Tetragonum, Gr.; (see Tetra-) + corner, angle: cf. F. Tetragone. Source: Websters Dictionary (01 Mar 1998) |
| tetragonal | 1. <geometry> Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers. 2. <botany> Having four prominent longitudinal angles. 3. <chemistry> Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization. Source: Websters Dictionary (01 Mar 1998) |
| tetragonus | An obsolete term for platysma muscle. (05 Mar 2000) |
| tetragynia | <botany> A Linnaean order of plants having four styles. Origin: NL, fr. Gr. Tetra- (see Tetra-) + gynh = a woman, female. Source: Websters Dictionary (01 Mar 1998) |