| spir- | See: spiro-. (05 Mar 2000) |
|---|---|
| spirable | Capable of being breathed; respirable. Origin: L. Spirabilis. Source: Websters Dictionary (01 Mar 1998) |
| spiracle | 1. <anatomy> The nostril, or one of the nostrils, of whales, porpoises, and allied animals. 2. <zoology> One of the external openings communicating with the air tubes or tracheae of insects, myriapods, and arachnids. They are variable in number, and are usually situated on the sides of the thorax and abdomen, a pair to a segment. These openings are usually elliptical, and capable of being closed. A tubular orifice communicating with the gill cavity of certain ganoid and all elasmobranch fishes. It is the modified first gill cleft. 3. Any small aperture or vent for air or other fluid. Origin: L. Spiraculum, fr. Spirare to breathe: cf. F. Spiracule. See Spirit. Source: Websters Dictionary (01 Mar 1998) |
| spiradenitis | Synonym: hidradenitis. Origin: L. Spiro, to breathe or perspire, + G. Aden, gland, + -itis, inflammation (05 Mar 2000) |
| spiradenoma | <tumour> A benign tumour of sweat glands. Origin: G. Speira, coil, + adenoma (05 Mar 2000) |
| spiraea | <botany> A genus of shrubs or perennial herbs including the meadowsweet and the hardhack. Origin: L, fr. Gr, fr. A coil. Source: Websters Dictionary (01 Mar 1998) |
| spiraeic | <chemistry> Of, pertaining to, or derived from, the meadowsweet (Spiraea); formerly, designating an acid which is now called salicylic acid. Source: Websters Dictionary (01 Mar 1998) |
| spiral | Of leaves or floral organs, borne at different levels on the main stem, in an ascending spiral. Compare: cyclic. (09 Oct 1997) |
| spiral and curved bacteria | A large, very diverse group of bacteria in which some species are curved, some helical. (12 Dec 1998) |
| spiral artery | <anatomy, artery> One of the corkscrew-like artery's in premenstrual or progestational endometrium. Synonym: coiled artery of the uterus. (05 Mar 2000) |
| spiral bandage | An oblique bandage encircling a limb, the successive turns overlapping those preceding. (05 Mar 2000) |
| spiral bulbar septum | See: spiral septum. (05 Mar 2000) |
| spiral canal of cochlea | The winding tube of the bony labyrinth which makes two and a half turns about the modiolus of the cochlea; it is divided incompletely into two compartments by a winding shelf of bone, the bony spiral lamina. Synonym: canalis spiralis cochleae, Rosenthal's canal, spiral canal of cochlea. (05 Mar 2000) |
| spiral canal of modiolus | <anatomy> The space in the modiolus in which the spiral ganglion of the cochlear nerve lies. Synonym: canalis spiralis modioli. (05 Mar 2000) |
| spiral cleavage | <marine biology> Pattern of early cleavage found in molluscs and annelids (both mosaic eggs). The animal pole blastomeres are rotated with respect to those of the vegetal pole. The handedness of the spiral twist is maternally inherited. (18 Nov 1997) |