Pathognomonic \Pa*thog`no*mon"ic\, a. [Gr. ? skilled in judging
of diseases; pa`qos 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.
[1913 Webster]
The true pathognomonic sign of love jealousy.
--Arbuthnot.
[1913 Webster]