any phenomenon or circumstance accompanying something and serving as evidence of it.

a sign or indication of something.

Pathology . a phenomenon that arises from and accompanies a particular disease or disorder and serves as an indication of it.

noun

evidence , expression , index , indication , indicia , manifestation , mark , note , significant , syndrome , token , warning , badge , indicator , signification , stamp , witness , ache , clew , clue , criterion , diagnosis , diagnostic. associatedwords: symptomatic , diagnosticate , fever , pathognomonic , prodrome , rymptomatology , semeiography , semeiology , semeiotic , sign , signal