Webster's Online Dictionary
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Definition: HEMIHEDRAL

Part of Speech Definition
Adjective 1. 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.[Websters]
2. Infrequently used base adjective of the adverb hemihedrally.[Eve - graph theoretic]
Adverb Form
(hemihedrally)
1. Rarely used adverbial inflection of the adjective hemihedral.[Eve - graph theoretic]

Source: Webster's Revised Unabridged Dictionary (1913), compiled from various sources, under license.

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Date "Hemihedral" was first used in popular English literature: sometime before 1914. (references)

Etymology:Hemihedral \Hem`i*he"dral\, adjective. [Hemi- Greek expression seat, base, from to sit.]. (references)

Specialty Definition: HEMIHEDRAL

Domain Definition
Mining In crystallography, having lower symmetry, resulting in forms with half the number of faces as the holohedral point group. Cf: holohedral; merohedral. (references)

Source: compiled by the editor from various references; see credits.

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Definition: HEMIHEDRAL

Part of SpeechDefinition
Adjective1. 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.[Websters]
2. Infrequently used base adjective of the adverb hemihedrally.[Eve - graph theoretic]
Adverb Form
(hemihedrally)
1. Rarely used adverbial inflection of the adjective hemihedral.[Eve - graph theoretic]

Source: Webster's Revised Unabridged Dictionary (1913), compiled from various sources, under license.

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Date "HEMIHEDRAL" was first used in popular English literature: sometime before 1914. (references)

Etymology:Hemihedral \Hem`i*he"dral\, adjective. [Hemi- Greek expression seat, base, from to sit.]. (references)

Specialty Definition: HEMIHEDRAL

DomainDefinition
MiningIn crystallography, having lower symmetry, resulting in forms with half the number of faces as the holohedral point group. Cf: holohedral; merohedral. (references)

Source: compiled by the editor from various references; see credits.

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