WordReference Random House Unabridged Dictionary of American English © 2025
hem•i•he•dral
(hem′i hē′drəl),USA pronunciation adj.
hem′i•he′dral•ly, adv.
- Crystallography(of a crystal) having only half the planes or faces required by the maximum symmetry of the system to which it belongs.
- hemi- + -hedral 1830–40
'hemihedral' also found in these entries (note: many are not synonyms or translations):