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De - Pt| English Dictionary: hemihedral | by the DICT Development Group |
| 1 result for hemihedral | |
| From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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Hemihedral \Hem`i*he"dral\, a. [Hemi- + Gr. [?] seat, base, fr. [?] to sit.] (Crystallog.) Having half of the similar parts of a crystals, instead of all; consisting of half the planes which full symmetry would require, as when a cube has planes only on half of its eight solid angles, or one plane out of a pair on each of its edges; or as in the case of a tetrahedron, which is hemihedral to an octahedron, it being contained under four of the planes of an octahedron. -- {Hem`i*he"dral*ly}, adv. | |
