/ Dictionary / Index H HYDROLANT: Meaning and Definition of Find definitions for: HYDROLANT Pronunciation: (hī'dru-lant"), [key] — n. an urgent warning of navigational dangers in the Atlantic Ocean, issued by the U.S. Navy Hydrographic Office. Cf. HYDROPAC. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrokinetics hydrolase Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language