morbidus

1. Æger is the generic term for every sort of illness and uneasiness, whether mental or physical; ægrotus and morbidus indicate bodily illness: ægrotus is applied particularly to men; morbidus, to brutes: the æger feels himself ill; the ægrotus and morbidus actually are so. 2. Morbus and valetudo denote an actual illness; morbus, objectively, that which attacks men; valetudo, subjectively, the state of the sick, though this distinction was introduced by writers of the silver age; invaletudo means only an indisposition. (iv. 172.)