| simian malaria | Plasmodial infection of monkeys and apes, as with human malaria, transmitted chiefly by anopheline mosquitoes; a number of Plasmodium species are responsible, with Southeast Asia and Africa being the apparent centres of evolution; among the 20 plasmodial agents described from nonhuman primates, some resemble and induce a malarial infection similar to those caused by the four species of Plasmodium from humans, from which the agents of human malaria appear to be derived. Synonym: monkey malaria. (05 Mar 2000) |
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| simian vacuolating virus No. 40 | A small (40 to 45 nm) DNA virus of the genus Polyomavirus, family Papovaviridae; the cause of seemingly inapparent infections in monkeys, especially rhesus, and a common contaminant of monkey cell cultures; the virus may cause inapparent infection in humans and may be excreted in stools of children for several weeks; it can produce fibrosarcoma in suckling hamsters, and transformation may occur in human diploid cells; it may also form "hybrid" virus in cells also infected with certain adenoviruses. Synonym: simian virus 40. (05 Mar 2000) |
| simian virus | Any of a number of virus's, belonging to various families, isolated from monkeys or from cultures of monkey cells. Synonym: vacuolating virus. (05 Mar 2000) |
| Simian Virus 40 | See: SV40. (18 Nov 1997) |
| similar | 1. Exactly corresponding; resembling in all respects; precisely like. 2. Nearly corresponding; resembling in many respects; somewhat like; having a general likeness. 3. Homogenous; uniform. <geometry> Similar figures, figures which differ from each other only in magnitude, being made up of the same number of like parts similarly situated. Similar rectilineal figures, such as have their several angles respectively equal, each to each, and their sides about the equal angles proportional. Similar solids, such as are contained by the same number of similar planes, similarly situated, and having like inclination to one another. Origin: F. Similaire, fr. L. Similis like, similar. See Same, and cf. Simulate. Source: Websters Dictionary (01 Mar 1998) |
| similia similibus curantur | The homeopathic formula expressing the law of similars, the doctrine that any drug capable of producing morbid symptoms in the healthy will remove similar symptoms occurring as an expression of disease. Another reading of the formula, employed by Hahnemann, the founder of homeopathy, is similia similibus curentur, let likes be cured by likes. Origin: L. Likes are cured by likes (05 Mar 2000) |
| similimum | Simillimum In homeopathy, the remedy indicated in a certain case because the same drug, when given to a healthy person, will produce the symptom complex most nearly approaching that of the disease in question. Origin: L. Simillimus, most like, superl. Of similis, like (05 Mar 2000) |
| similitude | 1. The quality or state of being similar or like; resemblance; likeness; similarity; as, similitude of substance. "Let us make now man in our image, man In our similitude." (Milton) "If fate some future bard shall join In sad similitude of griefs to mine." (Pope) 2. The act of likening, or that which likens, one thing to another; fanciful or imaginative comparison; a simile. "Tasso, in his similitudes, never departed from the woods; that is, all his comparisons were taken from the country." (Dryden) 3. That which is like or similar; a representation, semblance, or copy; a facsimile. "Man should wed his similitude." (Chaucer) Origin: F. Similitude, L. Similitudo, from similis similar. See Similar. Source: Websters Dictionary (01 Mar 1998) |
| simmer | To boil gently, or with a gentle hissing; to begin to boil. "I simmer as liquor doth on the fire before it beginneth to boil." (Palsgrave) Origin: Prov. E. Also simper; an onomatopoetic word. Source: Websters Dictionary (01 Mar 1998) |
| Simmonds' disease | Anterior pituitary insufficiency due to trauma, vascular lesions, or tumours; usually developing postpartum as a result of pituitary necrosis caused by ischemia during a hypotensive episode during delivery; characterised clinically by asthenia, loss of weight and body hair, arterial hypotension, and manifestations of thyroid, adrenal, and gonadal hypofunction. Synonym: hypophysial cachexia, pituitary cachexia. (05 Mar 2000) |
| Simmonds, Morris | <person> German physician, 1855-1925. See: Simmonds' disease. (05 Mar 2000) |
| Simmons' citrate medium | A diagnostic medium used in the differentiation of species of Enterobacteriaceae, based on their ability to utilise sodium citrate as the sole source of carbon. (05 Mar 2000) |
| Simmons, J | <person> U.S. Bacteriologist, 1890-1954. See: Simmons' citrate medium. (05 Mar 2000) |
| simon nitinol ivc filter | <radiology> Introduced 1990; Nitinol Medical Technologies, Woburn, MA. BARD, thermal memory alloy:titanium and nickel;, straightened form at cool temperatures (4-10C), reforms into predetermined filter shape at body temperatures efficacy, recurrent PE: 0 - 4.8%, IVC thrombosis: 7 - 11% (by clinical symptoms), access site thrombosis: 2 - 10% advantages, narrow introducer sheath (9 Fr), largest choice of access: brachial or left CFV approach without difficulty, only mild MRI artifacts disadvantages, IVC thrombosis: symptomatic occlusion rates higher than reported wtih Greenfield or bird's nest filters, caval penetration: 1 - 33%, caudal drop: exact filter location difficult to predict (12 Dec 1998) |
| Simon's position | A position for vaginal examination; a supine position with hips elevated, thighs and legs flexed, and thighs widely separated. (05 Mar 2000) |