| seven | One more than six; six and one added; as, seven days make one week. Seven sciences. See the Note under Science. <astronomy> Seven stars, the Pleiades. Seven wonders of the world. See Wonders. <botany> Seven-year apple, a tropical climbing plant (Ipomoea tuberosa) related to the morning-glory. Origin: OE. Seven, seoven, seofen, AS. Seofon, seofan, seofen; akin to D. Zeven, OS, Goth, & OHG. Sibun, G. Sieben, Icel. Sjau, sjo, Sw. Sju, Dan. Syv, Lith. Septyni, Russ. Seme, W. Saith, Gael. Seachd, Ir. Seacht, L. Septem, Gr, Skr. Saptan. Cf. Hebdomad, Heptagon, September. Source: Websters Dictionary (01 Mar 1998) |
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| seven-day fever | A fever resembling dengue occurring at the end of the summer in India. Synonym: seven-day fever. Synonym: hasamiyami. (05 Mar 2000) |
| Sevenless | Drosophila gene that is required for development of the R7 cell in each ommatidium in the eye. Gene product is a receptor tyrosine kinase, related to the insulin receptor. (18 Nov 1997) |
| seventeenth | 1. The next in order after the sixteenth; one coming after sixteen others. 2. The quotient of a unit divided by seventeen; one of seventeen equal parts or divisions of one whole. 3. An interval of two octaves and a third. Source: Websters Dictionary (01 Mar 1998) |
| seventh cranial nerve | <anatomy, nerve> The facial nerve enervates the muscles of the face (facial expression). Lesion of the facial nerve cause a drooping to one side of the face, inability to wrinkle the forehead, inability to whistle, inability to close the eye and deviation of the mouth to the unaffected side. Synonym: cranial nerve VII. (27 Sep 1997) |
| seventh sense | The perception of the existence of the internal organs. Synonym: seventh sense, splanchnesthesia, splanchnesthetic sensibility. (05 Mar 2000) |
| sever disease | <radiology> Osteochondrosis of the apophysis of the os calcis, apopohysis becomes dense and sclerotic and undergoes fragmentation, difficult to differentiate from normal finding on plain films, apophysis normally varies greatly and may ossify from several centres (12 Dec 1998) |
| severe combined immunodeficiency | Group of rare congenital disorders characterised by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an x-linked or autosomal recessive defect. About half of the patients with autosomal recessive scid are deficient in the enzyme adenosine deaminase. (12 Dec 1998) |
| severe combined immunodeficient mice | Mice that lack both T and B lymphocytes and are used for transplantation and study of human lymphoid tissues resulting in a SCID-human mouse chimera. See: severe combined immunodeficiency. (05 Mar 2000) |
| severe postanoxic encephalopathy | Coma that develops a few days to 3 weeks after an acute hypoxic insult; the latter was usually severe enough to cause an initial bout of coma, which cleared, and was followed by a transient interval of apparent normality. Synonym: severe postanoxic encephalopathy. (05 Mar 2000) |
| severin | <protein> Calcium dependent F actin cleaving protein (40 kD) isolated from Dictyostelium discoideum, that binds irreversibly to the barbed ends of the microfilament, not, apparently, essential for movement. (18 Nov 1997) |
| Severinghaus electrode | A glass electrode in a film of bicarbonate solution covered by a thin plastic membrane permeable to carbon dioxide but impermeable to water and electrolytes; the carbon dioxide pressure of a gas or liquid sample quickly equilibrates through the membrane and is measured in terms of the resulting pH of the bicarbonate solution, as sensed by the glass electrode; commonly used to analyze arterial blood samples. Synonym: Severinghaus electrode. (05 Mar 2000) |
| Severinghaus, John | <person> U.S. Physiologist and anaesthesiologist, *1922. See: Severinghaus electrode. (05 Mar 2000) |
| severity of illness index | Levels of severity of illness within a diagnostic group which are established by various measurement criteria. (12 Dec 1998) |
| sevoflurane | Fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether;a halogenated ether for inhalation anaesthesia. (05 Mar 2000) |