| Stas, Jean-Servais | <person> Belgian chemist, 1813-1891. See: Stas-Otto method. (05 Mar 2000) |
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| Stas-Otto method | A method of extraction of alkaloids from plants and animal bodies: the substance is digested in alcohol and tartaric acid, the fatty and resinous matters are precipitated with water, the fluid is made alkaline, and the alkaloids are extracted with ether or chloroform. (05 Mar 2000) |
| stasimorphia | Deformity due to arrested development. Origin: G. Stasis, a standing still, + morphe, shape (05 Mar 2000) |
| stasis | A word termination indicating the maintenance of (or maintaining) a constant level, preventing increase or multiplication. Origin: Gr. = a standing still (18 Nov 1997) |
| stasis cirrhosis | An extensive fibrotic reaction within the liver as a result of chronic constrictive pericarditis or prolonged congestive heart failure; true cirrhosis with fibrous bridging of lobules is unusual. Synonym: cardiac liver, congestive cirrhosis, pseudocirrhosis, stasis cirrhosis. (05 Mar 2000) |
| stasis dermatitis | Erythema and scaling of the lower extremities due to impaired venous circulation, seen commonly in older women or secondary to deep vein thrombosis. (05 Mar 2000) |
| stasis eczema | Eczematous eruption on legs due to or aggravated by vascular stasis. (05 Mar 2000) |
| stasis ulcer | Ulcer due to varicose veins. Chronic venous insufficiency in the deep veins of the legs leads to shunting the venous return into the superficial veins, in which pressure and flow rate, as well as oxygen content, are increased. (12 Dec 1998) |