| tetrachotomous | <botany> Having a division by fours; separated into four parts or series, or into series of fours. Origin: Gr. In four parts + to cut. Source: Websters Dictionary (01 Mar 1998) |
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| tetracid | <chemistry> Capable of neutralising four molecules of a monobasic acid; having four hydrogen atoms capable of replacement ba acids or acid atoms; said of certain bases; thus, erythrine, C4H6(OH)4, is a tetracid alcohol. Origin: Tetra + acid. Source: Websters Dictionary (01 Mar 1998) |
| tetracoccous | <botany> Having four cocci, or carpels. See: Tetra-, and Coccus. Source: Websters Dictionary (01 Mar 1998) |
| tetracoccus | A spherical bacterium that divides in two planes and characteristically forms groups of four cells. Origin: tetra-+ G. Kokkos, berry (05 Mar 2000) |
| tetracolon | A stanza or division in lyric poetry, consisting of four verses or lines. Origin: Gr. With four members; (see Tetra-) + limb, member. Source: Websters Dictionary (01 Mar 1998) |
| tetracoralla | <paleontology> Same as Rugosa. Origin: NL. See Tetra-, and Corallum. Source: Websters Dictionary (01 Mar 1998) |
| tetracosactide | <chemical> Alpha(1-24)-corticotropin. A synthetic polypeptide with adrenocorticotropic activity. Chemical name: alpha1-24-Corticotropin (12 Dec 1998) |
| tetracrotic | Denoting a pulse curve with four upstrokes in the cycle. Origin: tetra-+ G. Krotos, a striking (05 Mar 2000) |
| tetractinellid | <zoology> Any species of sponge of the division Tetractinellida. Also used adjectively. Source: Websters Dictionary (01 Mar 1998) |
| tetractinellida | <zoology> A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Synonym: Tetractinellinae. Origin: NL, from Gr. Tetra- +, ray, spoke. Source: Websters Dictionary (01 Mar 1998) |
| tetracuspid | Having four cusps. Synonym: quadricuspid. (05 Mar 2000) |
| tetracycline | <drug> Broad spectrum antibiotic that blocks binding of aminoacyl tRNA to the ribosomes of both gram-positive and gram-negative organisms (and those of organelles). Produced by Streptomyces aureofasciens. Other exaples include tetracycline, demeclocycline and doxycycline. (09 Oct 1997) |
| tetracycline 5a(11a)dehydrogenase | <enzyme> Catalyses the oxidation of 7-chloro-5a(11a)-dehydrotetracycline to 7-chlorotetracycline; uses nadp Registry number: EC 1.3.1.- (26 Jun 1999) |
| tetracycline resistance | Nonsusceptibility of a microbe (usually a bacterium) to the action of tetracycline, which binds to the 30s ribosomal subunit and prevents the normal binding of aminoacyl-trna. (12 Dec 1998) |
| tetracyclines | Closely congeneric derivatives of the polycyclic naphthacenecarboxamide. (gilman et al., goodman and gilman's the pharmacological basis of therapeutics, 8th ed, p1117) (12 Dec 1998) |