| tetrasepalous | <botany> Having four sepals. Origin: Tetra- + sepal. Source: Websters Dictionary (01 Mar 1998) |
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| tetrasomic | Relating to a cell nucleus in which one chromosome is represented four times while all others are present in the normal number. Origin: tetra-+ chromosome (05 Mar 2000) |
| tetraspermous | <botany> Having four seeds. Tetraspermous plant, a plant which produces four seeds in each flower. Origin: Tetra- + Gr. A seed. Source: Websters Dictionary (01 Mar 1998) |
| tetraspore | <botany> A nonsexual spore, one of a group of four regularly occurring in red seaweeds. Tetraspor"ic. Origin: Tetra- + spore. Source: Websters Dictionary (01 Mar 1998) |
| tetraster | A figure exceptionally and abnormally occurring in mitosis, in which there are four asters. Origin: tetra-+G. Aster, star (05 Mar 2000) |
| tetrastichiasis | Duplication of the growth of the eyelashes (in four rows). Origin: tetra-+ G. Stichos, row (05 Mar 2000) |
| tetraterpenes | Hydrocarbons or their derivatives formed by the condensation of eight isoprene units (i.e., four terpenes) and therefore containing 40 carbon atoms; e.g., various carotenoids. (05 Mar 2000) |
| tetrathecal | <botany> Having four loculaments, or thecae. Origin: Tetra- + thecal. Source: Websters Dictionary (01 Mar 1998) |
| tetrathionate | <chemistry> A salt of tetrathionic acid. Source: Websters Dictionary (01 Mar 1998) |
| tetrathionate hydrolase | <enzyme> From thiobacillus acidophilus; converts tetrathionate into thiosulfate, sulfur, and sulfate; also converts pentathionate Registry number: EC 3.12.1.- (26 Jun 1999) |
| tetrathionate reductase | <enzyme> Tetrathionate is reduced to thiosulfate Registry number: EC 1.7.- (26 Jun 1999) |
| tetrathionic | <chemistry> Of, pertaining to, or designating, a thionic derivative, HSO, of sulphuric acid, obtained as a colourless, odorless liquid. Origin: Tetra- + thionic. Source: Websters Dictionary (01 Mar 1998) |
| tetrathionic acid | <chemical> Tetrathionic acid (hoso2ssso3h). A sulfuric acid dimer, formed by disulfide linkage. This compound has been used to prolong coagulation time and as an antidote in cyanide poisoning. Pharmacological action: anticoagulant, antidotes, indicators and reagents. Chemical name: Tetrathionic acid (12 Dec 1998) |
| tetratomic | <chemistry> Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic. Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic. Origin: Tetra- + atomic. Source: Websters Dictionary (01 Mar 1998) |
| Tetratrichomonas | A genus of parasitic protozoan flagellates, formerly part of the genus Trichomonas but now separated into a distinct genus by the presence of four anterior and one trailing flagella, a pelta, and a disc-shaped parabasal body. See: Trichomonas. Origin: tetra-+ Trichomonas Tetratrichomonas ovis, a species that occurs in the caecum or rumen of domestic sheep. (05 Mar 2000) |