Meaning of tetartohedral

te•tar•to•he•dral

Pronunciation: (ti-tär"tō-hē'drul), [key]
— adj.
  1. (of a crystal) having one fourth the planes or faces required by the maximum symmetry of the system to which it belongs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.