the world > health and disease > ill health > a disease > disorders associated with age > [noun] > of old age (6)
The condition of being old and infirm; impairment of the faculties by old age; senile infirmity or decay. Now rare.
esp. The infirmity of old age, senility.
a wasting disorder thought to occur in the middle-aged, esp. middle-aged men.
Physiology. ‘The retrograde change which occurs in the body in old age, or in some organ when its permanent or temporary purpose has been fulfilled’…