/ Dictionary / Index H hydrarch: Meaning and Definition of Find definitions for: hy•drarch Pronunciation: (hī'drärk), [key] — adj. Ecol. (of a sere) originating in a wet habitat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydranth hydrargillite Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language