/ Dictionary / Index G geohydrology: Meaning and Definition of Find definitions for: ge•o•hy•drol•o•gy Pronunciation: ( jē"ō-hī-drol'u-jē), [key] — n. hydrogeology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. geography geoid Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language