- (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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
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