Pa*thog`no*mon"ic (?), a. [Gr. &?; skilled in judging of diseases; &?; a disease + &?; skilled: cf. F. pathognomonique. See Gnomic.] (Med.) Specially or decisively characteristic of a disease; indicating with certainty a disease; as, a pathognomonic symptom.

The true pathognomonic sign of love jealousy.