holohedraladj.
/hɒlə(ʊ)ˈhiːdrəl//hɒlə(ʊ)ˈhɛdrəl/ Crystallography.
Of a crystal: Having the full number of planes required by the highest degree of symmetry belonging to its system.
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holohedral1837
holosymmetrical1895
1837 J. D. Dana Min. (1844) i. 38 The holohedral and hemihedral forms may be separately considered.
1855 W. A. Miller Elements Chem. 103 Hemihedral forms..may be derived from a holohedral form, as the tetrahedron is from the octahedron.
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holoˈhedrism n. the condition or quality of being holohedral, crystallization in holohedral forms.
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holoˈhedron n. [compare French holoèdre] a holohedral crystal or form.In modern dictionaries.
This entry has not yet been fully updated (first published 1899; most recently modified version published online September 2018).
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adj.1837