Pa-thŏg/no-mŏn'ic, a.

a. [Gr. παθογνωμονικός, skilled in judging of affections or diseases, from πάθος, a suffering, from παθεῖν, πάσχειν, to suffer, and γνωμονικός, experienced or skilled, from γνώμων, one who knows or examines, from γνῶναι, γιγνώσκειν, to learn to know, to know; Fr. pathognomonique, It. patognomonico.] (Med.) Characteristic of a disease; as, a pathognomonic symptom or sign is one that indicates with certainty the disease which produces it.