/ Dictionary / Index H hydrometer: Meaning and Definition of Find definitions for: hy•drom•e•ter Pronunciation: (hī-drom'i-tur), [key] — n. an instrument for determining the specific gravity of a liquid, commonly consisting of a graduated tube weighted to float upright in the liquid whose specific gravity is being measured. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydrometer (Thesaurus) hydrometeorology hydromorphic Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language