gerontic

Of or pertaining to old age or the elderly.

The gerontic population of the U.S., those of 65 and over, numbered 3.1 million in 1900.

Academic staff from schools of nursing across Australia were asked to contribute information about their current funded research in gerontic nursing, and also to provide their thoughts on what issues future research projects within gerontic nursing should address.

Of or pertaining to senescent animals or plants.

Then the gerontic or senescent portion is seen, recognizable by an increasing simplicity, comparable to that of the neanic shell but retrogressive rather than progressive in the assumption of characters.