in Medicine, are symptoms which usually attend a disease, but not always; hence differing from pathognomonic signs, which are inseparable from the disease: e.g. in the pleurisy, a pungent pain in the side, in an acute fever, difficulty of breath- ing, &c. collectively taken, are pathognomonic signs; but that the pain extends to the hypochondrium or clavicle, or that the patient lies with more ease on one side than on the other, are assident signs.