hemihedral

Related to hemihedral: hemialgia

hem·i·he·dral

 (hĕm′ĭ-hē′drəl)
adj.
Exhibiting only half the faces required for complete symmetry. Used of a crystal.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hemihedral

(ˌhɛmɪˈhiːdrəl)
adj
(Chemistry) (of a crystal) exhibiting only half the number of planes necessary for complete symmetry
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

hem•i•he•dral

(ˌhɛm ɪˈhi drəl)

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]
hem`i•he′dral•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Crystal Physics-Development by Pressure 0/ Polar Electricity in Hemihedral Crystals with Inclined Faces, Acad.
"Wurtzite" was first reported from the 200 and 300 levels (61 and 91 m) of the Gagnon mine by Pearce (1887), as brown to black masses and as rare, small, hemihedral hexagonal pyramids associated with quartz and barite.
Crystal Physics-Development by Pressure of Polar Electricity in Hemihedral Crystals with Inclined Faces, Acad.
The hexagonal brown crystals turned out to be hemihedral. That suggested wurtzite.