/ Dictionary / Index H historical geology: Meaning and Definition of Find definitions for: histor'ical geol'ogy Pronunciation: [key] the branch of geology dealing with the history of the earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. historical historical linguistics Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language