Hĕp'ta-hĕx'a-hē'dral, a.
a. [Gr. ἑπτά, seven, and hexahedral, q. v.] Presenting seven ranges of faces one above another, each range containing six faces.
a. [Gr. ἑπτά, seven, and hexahedral, q. v.] Presenting seven ranges of faces one above another, each range containing six faces.