| spinous process | The dorsal projection from the centre of a vertebral arch. Synonym: sphenoidal spine. (05 Mar 2000) |
|---|---|
| spinous process of tibia | Intercondyloid eminence, an elevation on the proximal extremity of the tibia between the two articular surfaces. Synonym: eminentia intercondylaris, eminentia intercondyloidea, spinous process of tibia. (05 Mar 2000) |
| spinster | 1. A woman who spins, or whose occupation is to spin. "She spake to spinster to spin it out." (Piers Plowman) "The spinsters and the knitters in the sun." (Shak) 2. A man who spins. 3. An unmarried or single woman; used in legal proceedings as a title, or addition to the surname. "If a gentlewoman be termed a spinster, she may abate the writ." (Coke) 4. A woman of evil life and character; so called from being forced to spin in a house of correction. Origin: Spin + -ster. Source: Websters Dictionary (01 Mar 1998) |
| spinstress | A woman who spins. Source: Websters Dictionary (01 Mar 1998) |
| spintharicon | A spark chamber device used to record the distribution of low energy emissions from radiopharmaceuticals administered internally, especially for thyroid scans using iodine-125. Origin: G. Spinther, spark (05 Mar 2000) |
| spinthariscope | Synonym: scintillation counter. Origin: G. Spinther, spark, + skopeo, to view (05 Mar 2000) |
| spinulescent | <botany> Having small spines; somewhat thorny. Source: Websters Dictionary (01 Mar 1998) |
| spiny | 1. Full of spines; thorny; as, a spiny tree. 2. Like a spine in shape; slender. "Spiny grasshoppers sit chirping." 3. Abounding with difficulties or annoyances. "The spiny deserts of scholastic philosophy." (Bp. Warburton) Spiny lobster. <zoology> Same as Rock lobster, under Rock. See also Lobster. Origin: From Spine. Source: Websters Dictionary (01 Mar 1998) |
| spiodea | <zoology> An extensive division of marine Annelida, including those that are without oral tentacles or cirri, and have the gills, when present, mostly arranged along the sides of the body. They generally live in burrows or tubes. Origin: NL, fr. Spio the typical genus. Source: Websters Dictionary (01 Mar 1998) |
| spiperone | <chemical> A spiro butyrophenone analog similar to haloperidol and other related compounds. It has been recommended in the treatment of schizophrenia. Pharmacological action: antipsychotic agents, butyrophenone, dopamine antagonists. Chemical name: 1,3,8-Triazaspiro(4.5)decan-4-one, 8-(4-(4-fluorophenyl)-4-oxobutyl)-1-phenyl- (12 Dec 1998) |
| 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) |