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; semeiology.
⇒ It includes diagnosis, or the determination of the disease from its symptoms; and prognosis, or the determination of its probable course and event.
© Webster 1913.