2. That branch of medical science which treats of diseases,
or of the classification of diseases.
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.
{Celluar pathology}, a theory that gives prominence to the
vital action of cells in the healthy and diseased function
of the body. --Virchow.