- dihexagonal pyramid
: a pyramid any horizontal section of which is dihexagonal
Useful english dictionary. 2012.
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Dihexagonal — Di hex*ag o*nal, a. [Pref. di + hexagonal.] (a) Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base. (b) Having twelve similar faces; as, a dihexagonal prism. [1913… … The Collaborative International Dictionary of English
berylloid — ˈberəˌlȯid noun ( s) Etymology: International Scientific Vocabulary beryll (probably from Latin beryllus) + oid; from the frequent occurrence of beryl crystals in this form : a form consisting of a double 12 sided pyramid : the dihexagonal… … Useful english dictionary
dipyramid — (ˈ)dī+ noun Etymology: di + pyramid : a crystal consisting of two pyramids base to base, the one geometrically a mirror image of the other with respect to the horizontal plane of symmetry dipyramids occur in the tetragonal, hexagonal, and… … Useful english dictionary