tetartohedral

tetartohedral

(tɪˌtɑːtəʊˈhiːdrəl)
adj
(Chemistry) (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]
teˌtartoˈhedrally adv
teˌtartoˈhedralism, teˌtartoˈhedrism n