| semidirect leads | Those in which the exploring electrode is on the chest overlying the heart or its vicinity. Synonym: precordial leads, semidirect leads. (05 Mar 2000) |
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| semidouble | An office or feast celebrated with less solemnity than the double ones. See Double. <botany> Having the outermost stamens converted into petals, while the inner ones remain perfect; said of a flower. Source: Websters Dictionary (01 Mar 1998) |
| semiflexion | The position of a joint or segment of a limb midway between extension and flexion. (05 Mar 2000) |
| semifloret | <botany> See Semifloscule. Source: Websters Dictionary (01 Mar 1998) |
| semifloscule | <botany> A floscule, or florest, with its corolla prolonged into a strap-shaped petal. Synonym: semifloret. Source: Websters Dictionary (01 Mar 1998) |
| semiflosculous | <botany> Having all the florets ligulate, as in the dandelion. Source: Websters Dictionary (01 Mar 1998) |
| semiglutin | <physiology> A peptonelike body, insoluble in alcohol, formed by boiling collagen or gelatin for a long time in water. Hemicollin, a like body, is also formed at the same time, and differs from semiglutin by being partly soluble in alcohol. Source: Websters Dictionary (01 Mar 1998) |
| semihorizontal heart | Loosely refers to the heart's electrical axis when this is directed at approximately 0 |
| semilens | <optics> The half of a lens divided along a plane passing through its axis. Source: Websters Dictionary (01 Mar 1998) |
| semilente insulin | Sterile suspension of insulin in buffered water for injection, modified by the addition of zinc chloride such that the solid phase of the suspension is amorphous; it contains 40 or 80 units per ml; the duration of action is equivalent to that of insulin injection. Synonym: amorphous insulin zinc suspension, semilente insulin. (05 Mar 2000) |
| semilenticular | Half lenticular or convex; imperfectly resembling a lens. Source: Websters Dictionary (01 Mar 1998) |
| semiligneous | Half or partially ligneous, as a stem partly woody and partly herbaceous. Source: Websters Dictionary (01 Mar 1998) |
| semilunar | Shaped like a half moon. <anatomy> Semilunar bone, the valves at the beginning of the aorta and of the pulmonary artery which prevent the blood from flowing back into the ventricle. <anatomy> The semilunar bone. Source: Websters Dictionary (01 Mar 1998) |
| semilunar bone | An obsolete term for lunate bone. (05 Mar 2000) |
| semilunar cartilage | One of the articular menisci of the knee joint. See: lateral meniscus, medial meniscus. (05 Mar 2000) |