WordReference Random House Unabridged Dictionary of American English © 2026
bi•sphe•noid
(bī sfē′noid),USA pronunciation n. [Crystall.]
- Crystallographya tetrahedral form, each edge of which is bisected by the perpendicular bisecting the edge that does not intersect it. Also called disphenoid.
- bi-1 + sphenoid
'bisphenoid' also found in these entries (note: many are not synonyms or translations):