/ Dictionary / Index S subhedral: Meaning and Definition of Find definitions for: sub•he•dral Pronunciation: (sub-hē'drul), [key] — adj. Petrog. (of mineral grains comprising igneous rocks) having a partial or incomplete crystal face or form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subhead subhuman Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language