| spirostans | Steroid derivatives containing a fused lactone ring at the 16,17-position and a spiroglycosidic linkage at c-22. The most common representatives in this group are the plant-derived sapogenins. (12 Dec 1998) |
|---|---|
| spiroylous | <chemistry> Pertaining to, or designating, a substance now called salicylal. Origin: NL. Spir meadowsweet (a source of salicylal) + -yl + -ic, -ous. Source: Websters Dictionary (01 Mar 1998) |
| spirula | <zoology> A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact. Origin: NL, dim. Of L. Spira a coil. Source: Websters Dictionary (01 Mar 1998) |
| spirulate | <zoology> Having the colour spots, or structural parts, arranged spirally. Source: Websters Dictionary (01 Mar 1998) |
| spirurida | An order of nematodes of the subclass secernentea. Characteristics include ventral or caudoventral papillae and an oesophagus divided into anterior muscular and posterior glandular parts. (12 Dec 1998) |
| spirurida infections | Infections with nematodes of the order spirurida. (12 Dec 1998) |
| spirurina | A suborder of nematodes characterised by larvae possessing cephalic hooks and multinucleated oesophageal glands. (12 Dec 1998) |
| spiruroid | Common name for a member of the superfamily Spiruroidea. (05 Mar 2000) |
| spiruroid larva migrans | Extraintestinal migration by nematode larvae of the order Spiruroidea, not adapted to maturation in the human intestine; caused chiefly by species of Gnathostoma spinigerum and G. Hispidum in Japan and Thailand, following ingestion of uncooked fish infected with encapsulated third-stage infective larvae, and possibly by ingestion of infected copepods (the first intermediate host) in contaminated drinking water; the anteriorly spined larvae produce serpiginous tunnels in the skin or may cause subcutaneous or pulmonary abscess, or may invade the eye or brain. (05 Mar 2000) |
| spiruroidea | A superfamily of parasitic nematodes which requires one or two intermediate arthropod hosts before finally being eaten by the final host. Its organisms occur rarely in man. (12 Dec 1998) |