n.; pl. pathologies [ Gr. pa`qos a suffering, disease + -logy: cf. F. pathologie. ] 1. (Med.) The science which treats of diseases, their nature, causes, progress, symptoms, etc. [ 1913 Webster ]

☞ 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, ætiology, morbid anatomy, symptomatology, and therapeutics, which treat respectively of the classification, causation, organic changes, symptoms, and cure of diseases. [ 1913 Webster ]

2. (Med.) The condition of an organ, tissue, or fluid produced by disease. [ Webster 1913 Suppl. ]

Celluar pathology, a theory that gives prominence to the vital action of cells in the healthy and diseased functions of the body. Virchow. [ 1913 Webster ]