A sign or symptom that is so characteristic of a disease that it can be used to make a diagnosis. For example, Koplik spots in the mouth opposite the first and second upper molars are pathognomonic of measles.

Having to do with a sign or symptom that is specific to a certain disease.

characteristic or indicative of a disease; denoting symptoms or findings specific for a given disease and not found in any other condition.

1640s (implied in pathognomonical), from patho- "disease, suffering" + Greek gnomonikos "able to judge," from gnomon "one who knows" (see gnomon).

A sign or set of symptoms that characterize a specific disease and allow good differentiation from other diseases.

adjective. 1. depicting a sign, indication, or a set of signs or indicators which is symptomatic of a particular physical or cognitive disorder and not correlated with other disorders. 2. with regard [..]

Having to do with a sign or symptom that is specific to a certain disease.

Characteristic or indicative of a disease, denoting especially one or more typical symptoms, pathological lesions.

pertaining to a distinctive sign, symptom, or characteristics of a disease on which a diagnosis can be made.

  Characteristic or indicative of a disease.