/ Dictionary / Index H holohedral: Meaning and Definition of Find definitions for: hol•o•he•dral Pronunciation: (hol"u-hē'drul, hō"lu-), [key] — adj. (of a crystal) having all the planes or faces required by the maximum symmetry of the system to which it belongs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hologynic hololith Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language