| tetradecanoylphorbol acetate | <chemical> A phorbol ester found in croton oil with very effective tumour promoting activity. It stimulates the synthesis of both DNA and RNA. Pharmacological action: carcinogens. Chemical name: Tetradecanoic acid, 9a-(acetyloxy)-1a,1b,4,4a,5,7a,7b,8,9,9a-decahydro-4a,7b-dihydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-5-oxo-1H-cyclopropa(3,4)benz(1,2-e)azulen-9-yl ester, (1aR-(1aalpha,1bbeta,4abeta,7aalpha,7balpha,8alpha,9beta,9aalpha))- (12 Dec 1998) |
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| tetradecapoda | <zoology> Same as Arthrostraca. Origin: NL. See Tetra-, and Decapoda. Source: Websters Dictionary (01 Mar 1998) |
| tetradic | <chemistry> Of or pertaining to a tetrad; possessing or having the characteristics of a tetrad; as, a carbon is a tetradic element. Source: Websters Dictionary (01 Mar 1998) |
| tetradon | <zoology> See Tetrodon. Source: Websters Dictionary (01 Mar 1998) |
| tetradont | <zoology> See Tetrodont. Source: Websters Dictionary (01 Mar 1998) |
| tetradymite | <chemical> A telluride of bismuth. It is of a pale steel-gray colour and metallic luster, and usually occurs in foliated masses. Calles also telluric bismuth. Origin: Gr. Fourfold. So named from its occurrence in compound twin crystals, or fourlings. Source: Websters Dictionary (01 Mar 1998) |
| tetradynamia | <botany> A Linnaean class of plants having six stamens, four of which are longer than the others. Origin: NL, fr. Gr. (see Tetra-) + power. Source: Websters Dictionary (01 Mar 1998) |
| tetradynamian | <botany> A plant of the order Tetradynamia. Source: Websters Dictionary (01 Mar 1998) |
| tetradynamous | Of an androecium, consisting of four stamens of the same length and two of a different length. (09 Oct 1997) |
| 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) |
| 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) |