ASSIDENT SIGNS, in medicine, are symptoms which usually attend a disease, but not always; hence differing from pathognomic signs, which are inseparable from the disease: e. gr. In the pleurisy, a pungent pain in the side; in an acute fever, difficulty of breathing, &c. collectively taken, are pathognomic 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.