/ Dictionary / Index L lithology: Meaning and Definition of Find definitions for: li•thol•o•gy Pronunciation: (li-thol'u-jē), [key] — n. (loosely) petrology. the physical characteristics of a rock or stratigraphic unit. the study of the formation, pathology, and treatment of stones in the human body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lithology (Thesaurus) lithol. lithomarge Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language