Pathognomonic
Pronunciation : Pa*thog`no*mon"ic
Part of Speech : a.
Etymology : [Gr. pathognomonique. See Gnomic.] (Med.)
Definition : Defn: Specially or decisively characteristic of a disease; indicating with certainty a disease; as, a pathognomonic symptom. The true pathognomonic sign of love jealousy. Arbuthnot.
Source : Webster's Unabridged Dictionary, 1913