The Collaborative International Dictionary
pathology \pa*thol"o*gy\ (-j[y^]), n.; pl. pathologies (-j[i^]z). [Gr. pa`qos a suffering, disease + -logy: cf. F. pathologie.]
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(Med.) The science which treats of diseases, their nature, causes, progress, symptoms, etc.
Note: Pathology is general or special, according as it treats of disease or morbid processes in general, or of particular diseases; it is also subdivided into internal and external, or medical and surgical pathology. Its departments are nosology, [ae]tiology, morbid anatomy, symptomatology, and therapeutics, which treat respectively of the classification, causation, organic changes, symptoms, and cure of diseases.
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(Med.) The condition of an organ, tissue, or fluid produced by disease.
Celluar pathology, a theory that gives prominence to the vital action of cells in the healthy and diseased function of the body.
--Virchow.