Dictionary![]() ![]() pa•thol•o•gyPronunciation: (pu-thol'u-jē), [key] —n., —pl. -gies. 1. the science or the study of the origin, nature, and course of diseases. 2. the conditions and processes of a disease. 3. any deviation from a healthy, normal, or efficient condition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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