bisphenoid

[ bahy-sfee-noid ]

noun

, Crystallography.

1. a tetrahedral form, each edge of which is bisected by the perpendicular bisecting the edge that does not intersect it.

Word History and Origins

Origin of bisphenoid¹

bi- ¹ + sphenoid

Example Sentences

Tetragonal scalenohedron or ditetragonal bisphenoid (fig. 51).

From Project Gutenberg