Hemihedral
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. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • hemihedral — [hem΄i hē′drəl] adj. [ HEMI + HEDRAL] having half the number of faces required for complete symmetry: said of a crystal …   English World dictionary

  • hemihedral — adjective Etymology: hemi + hedron Date: 1837 of a crystal having half the faces required by complete symmetry compare holohedral, tetartohedral …   New Collegiate Dictionary

  • hemihedral — hemihedrally, adv. /hem i hee dreuhl/, adj. (of a crystal) having only half the planes or faces required by the maximum symmetry of the system to which it belongs. [1830 40; HEMI + HEDRAL] * * * …   Universalium

  • hemihedral — adjective Having only half the plane faces needed for the highest degree of symmetry in its system …   Wiktionary

  • hemihedral — hemi·he·dral …   English syllables

  • hemihedral — hem•i•he•dral [[t]ˌhɛm ɪˈhi drəl[/t]] adj. cry (of a crystal) having only half the planes or faces required by the maximum symmetry of the system to which it belongs • Etymology: 1830–40 hem i•he′dral•ly, adv …   From formal English to slang

  • hemihedral — /hɛmiˈhidrəl/ (say hemee heedruhl) adjective (of a crystal) having only half the planes or faces required by the maximum symmetry of the system to which it belongs. {hemi + Greek hedra seat, base + al1} –hemihedrally, adverb –hemihedrism,… …   Australian English dictionary

  • hemihedral — adj. Crystallog. having half the number of planes required for symmetry of the holohedral form …   Useful english dictionary

  • Hemihedrally — 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 …   The Collaborative International Dictionary of English

  • Holohemihedral — Hol o*hem i*he dral, a. [Holo + hemihedral.] (Crystallog.) Presenting hemihedral forms, in which all the sectants have halt the whole number of planes. Dana. [1913 Webster] …   The Collaborative International Dictionary of English

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