semidiurnal (semidiernal)

1. Pertaining to or accomplished in half a day (either twelve hours or six continuing half day. 2. In entom., partly diurnal; flying in twilight; crepuscular; specifically, of or pertaining to the Semidiurna. - Semidiurnal arc, in astron., the arc described by a heavenly body in half the time between its rising and setting. semi-dome (sem'i-dom), n. Half a dome, especially as formed by a vertical section; le Semi-dome, exterior. Apse of Suleimanié Mosque, Constantinople (A. D. 1550). properly, any feature of form or construction more or le similar to half a dome. The term applies especially to such quadrantal vaults as those Semi-dome, interior. Apse of Suleimanié Mosque, Constantinople (A. D. 1550). which cover in the apse of most Italian medieval churches, and of many French and German Romanesque churches. See also cut under apse. semi -floscule. semi - flosculous.