/ Dictionary / Index E etiology: Meaning and Definition of Find definitions for: e•ti•ol•o•gy Pronunciation: (ē"tē-ol'u-jē), [key] — pl. -gies. the study of the causes of diseases. the cause or origin of a disease. the study of causation. any study of causes, causation, or causality, as in philosophy, biology, or physics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: etiology (Thesaurus) etiologic etiquette 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