| bicuspid valve | <anatomy, cardiology> The heart valve that divides the left atrium and left ventricle. During left atrial contraction, the mitral valve opens to allow blood to flow into the left ventricle. Upon closure, the mitral valve prohibits the regurgitation of blood back into the left atrium. The mitral valve is the only heart valve that has only 2 valve cusps (all others have 3). (13 Nov 1997) |
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| bicuspidate | Having two points or prominences; ending in two points; said of teeth, leaves, fruit, etc. Source: Websters Dictionary (01 Mar 1998) |
| bicuspidization | Surgical change of a normally tricuspid valve into a functioning bicuspid valve; performed in correction of tricuspid valvar disease. (05 Mar 2000) |
| bicyclic monoterpenol dehydrogenase | <enzyme> Oxidises borneol to camphor; thujol to thujone; prefers nad to nadp Registry number: EC 1.1- (26 Jun 1999) |
| bicycling | The use of a bicycle for transportation or recreation. It does not include the use of a bicycle in studying the body's response to physical exertion (bicycle ergometry test see exercise test). (12 Dec 1998) |
| bicyclo compounds, heterocyclic | A class of saturated compounds consisting of two rings only, having two or more atoms in common, containing at least one hetero atom, and that take the name of an open chain hydrocarbon containing the same total number of atoms. (12 Dec 1998) |