/ Dictionary / Index H hydrocoral: Meaning and Definition of Find definitions for: hy•dro•cor•al Pronunciation: (hī"dru-kôr'ul, -kor'-), [key] — n. any colonial marine animal of the hydrozoan order Stylasterina having a calcareous skeleton resembling that of the true corals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrocooling hydrocortisone Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language