hemihedral

American  

[hem-i-hee-druhl] / ˌhɛm ɪˈhi drəl /

adjective

1. (of a crystal) having only half the planes or faces required by the maximum symmetry of the system to which it belongs.

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hemihedral British  

/ ˌhɛmɪˈhiːdrəl /

adjective

1. (of a crystal) exhibiting only half the number of planes necessary for complete symmetry

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Other Word Forms

• hemihedrally
  adverb

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Etymology

Origin of hemihedral

First recorded in 1830–40; hemi- + -hedral

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Example Sentences

See Examples For:

hemihedral

In this way a mixture of the two asparagines was obtained, which were separated by picking out the hemihedral crystals.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various

Corresponding to each of these hemihedral forms there is another geometrically similar form, differing, however, not only in orientation, but also in actual crystals in the characters of the faces.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

These systems, however, only represented holohedral forms, leaving the hemihedral and tetartohedral classes to be explained.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

All the forms are pedions, each consisting of a single plane; they are thus hemihedral with respect to crystals of the last class.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

By some authors these two divisions are treated as separate systems; or again the rhombohedral forms may be considered as hemihedral developments 580 of the hexagonal.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

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