- (of a crystal) having one fourth the planes or faces required by the maximum symmetry of the system to which it belongs.
Origin of tetartohedral
1855–60; < Greek tétarto(s) one fourth + -hedral
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Examples from the Web for tetartohedral
This is bounded by twelve irregular pentagons, and is a tetartohedral or quarter-faced form of the hexakis-octahedron.
These systems, however, only represented holohedral forms, leaving the hemihedral and tetartohedral classes to be explained.
- (of a crystal) having one quarter of the number of faces necessary for the full symmetry of its crystal system
C19: from Greek tetartos one fourth + -hedral
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012