Symp'tom-a-tŏl'o-gy, n.

n. [Fr. symptomatologie, from Gr. σύμπτωμα, symptom, and λόγος, discourse.] (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.