definition etiologic
eÂ·tiÂ·olÂ·oÂ·gy. n. pl. eÂ·tiÂ·olÂ·oÂ·gies also aeÂ·tiÂ·olÂ·oÂ·gies. 1. a. The study of causes or origins. b. The branch of medicine that deals with the causes or origins of disease. 2.