/ Dictionary / Index H hydrocolloid: Meaning and Definition of Find definitions for: hy•dro•col•loid Pronunciation: (hī"dru-kol'oid), [key] — n. a substance that forms a colloid when combined with water. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydrocolloid (Thesaurus) hydrocinnamic aldehyde hydrocooling Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language