/ Dictionary / Index H heliodor: Meaning and Definition of Find definitions for: he•li•o•dor Pronunciation: (hē'lē-u-dôr"), [key] — n. a clear yellow variety of beryl used as a gemstone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Heliochrome Heliogabalus Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language