tetartohedral

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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