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.
Arbuthnot.
© Webster 1913.