Thesaurus: hemihedral

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Definitions

1. a. 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.
2. 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.
3. Having half of the similar parts of a crystals, instead of all;consisting of half the planes which full symmetry would require, aswhen a cube has planes only on half of its eight solid angles, or oneplane out of a pair on each of its edges; or as in the case of atetrahedron, which is hemihedral to an octahedron, it being containedunder four of the planes of an octahedron.-- Hem`i*he"dral*ly, adv.
4. a. 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.