From The Collaborative International Dictionary of English v.0.48:

pathology \pa*thol"o*gy\ (-j[y^]), n.; pl. pathologies
   (-j[i^]z). [Gr. pa`qos a suffering, disease + -logy: cf. F.
   1. (Med.) The science which treats of diseases, their nature,
      causes, progress, symptoms, etc.
      [1913 Webster]

   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.
         [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]

From The Collaborative International Dictionary of English v.0.48:

Symptomatology \Symp`tom*a*tol"o*gy\, n. [Gr. ?, ?, symptom +
   -logy: cf. F. symptomatologie.] (Med.)
   The doctrine of symptoms; that part of the science of
   medicine which treats of the symptoms of diseases;
   [1913 Webster]

   Note: It includes diagnosis, or the determination of the
         disease from its symptoms; and prognosis, or the
         determination of its probable course and event.
         [1913 Webster]
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