hexahedral, a. Geom. and Cryst.
(hɛksəˈhiːdrəl, -ˈhɛdrəl)
Also hexaedral.
[f. next + -al1.]
Of the form of a hexahedron; having six faces.
| 1800 tr. Lagrange's Chem. I. 381 A salt crystallized in long hexaedral laminæ. 1805–17 R. Jameson Char. Min. (ed. 3) 206 Amphi-hexahedral [crystal], i.e. hexahedral in two senses, because by viewing the planes in two different directions, we obtain two six-sided surfaces. 1811 Pinkerton Petral. I. 325 Steatite, crystallised in hexahedral prisms. 1828 Stark Elem. Nat. Hist. II. 483 The Hexahedral or tessular form. |
So † hexaˈhedrical a. (in same sense).
| 1666 Boyle Orig. Formes & Qual., Like the Chrystals of Salt-petre..long and Hexaedrical. 1669 ― Contn. New Exp. i. (1682) 103 If a Hexahedrical Bit be employed it will make the Cavity almost as cylindrical as can be desired. |