/ Dictionary / Index G geologic: Meaning and Definition of Find definitions for: ge•o•log•ic Pronunciation: ( jē"u-loj'ik), [key] — adj. of, pertaining to, or based on geology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: geologic (Thesaurus) geol. Geological Survey Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language