/ Dictionary / Index H hydraul.: Meaning and Definition of Find definitions for: hydraul. Pronunciation: [key] hydraulics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrator hydraulic Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language