| ISA | <abbreviation> Intrinsic sympathomimetic activity. (05 Mar 2000) |
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| Isaac's syndrome | <syndrome> A rare sporadic disorder of unknown aetiology with onset usually in late childhood or early adulthood, characterised by intermittent or continuous involuntary muscle contractions, producing "stiffness" or "clumsiness" and accompanied by increased sweating, increased skin temperature, fasciculations, and myokymia. If facial, pharyngeal, or laryngeal muscles are involved, dysphasia and respiratory obstruction can occur. Muscle abnormalities persist during sleep and general anaesthesia, but are blocked by curare, indicating site of lesion is peripheral nerve. (05 Mar 2000) |
| isabella grape | <botany> A favorite sweet American grape of a purple colour. See Fox grape, under Fox. Source: Websters Dictionary (01 Mar 1998) |
| isabella moth | <zoology> A common American moth (Pyrrharctia isabella), of an isabella colour. The larva, called woolly bear and hedgehog caterpillar, is densely covered with hairs, which are black at each end of the body, and red in the middle part. Source: Websters Dictionary (01 Mar 1998) |
| isagogical | Introductory; especially, introductory to the study of theology. Origin: L. Isagogicus, Gr. Source: Websters Dictionary (01 Mar 1998) |
| isagogics | That part of theological science directly preliminary to actual exegesis, or interpretation of the Scriptures. Source: Websters Dictionary (01 Mar 1998) |
| isagon | <mathematics> A figure or polygon whose angles are equal. Origin: Gr. Equal + angle: cf. F. Isagone. Source: Websters Dictionary (01 Mar 1998) |
| Isamine blue | C4OH3ON3O6Na;an acid triarylmethane dye employed as a vital dye and as an elastin stain. Synonym: Isamine blue. (05 Mar 2000) |
| isatide | <chemistry> A white crystalline substance obtained by the partial reduction of isatin. Alternative forms: isatyde. Source: Websters Dictionary (01 Mar 1998) |
| isatin | <chemistry> An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. Alternative forms:, less properly, isatine See: Isatis. Source: Websters Dictionary (01 Mar 1998) |
| isatinic | <chemistry> Pertaining to, or derived from, isatin; as, isatic acid, which is also called trioxindol. Source: Websters Dictionary (01 Mar 1998) |
| isatis | <botany> A genus of herbs, some species of which, especially the Isatis tinctoria, yield a blue dye similar to indigo; woad. Origin: L, a kind of plant, Gr. Woad. Source: Websters Dictionary (01 Mar 1998) |
| isatogen | <chemistry> A complex nitrogenous radical, C8H4NO2, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue. Isatogen"ic. Origin: Isatin + -gen. Source: Websters Dictionary (01 Mar 1998) |
| isatropic | <chemistry> Pertaining to, or designating, an acid obtained from atropine, and isomeric with cinnamic acid. Origin: Is- + atropine. Source: Websters Dictionary (01 Mar 1998) |
| isauxesis | Growth of parts at the same rate as growth of the whole. Origin: G. Isos, even, + auxesis, increase (05 Mar 2000) |