hemidome Cryst.
(ˈhɛmɪdəʊm)
[f. hemi- + dome n. 5 b.]
A pair of parallel and equal faces, parallel to the orthodiagonal in the monoclinic (or monosymmetrical) system (in which two such pairs constitute a dome). Hence hemidoˈmatic a., of or pertaining to a hemidome.
| 1868 Dana Min. Introd. (ed. 5) 27 Monoclinic System..The domes parallel to the orthodiagonal are hemidomes, the planes in front at top being unlike in inclination those in front below, each being a hemidome. 1879 Rutley Study Rocks x. 88 When the light falls obliquely either on the basal plane..or the hemidome of a monoclinic felspar. |