the branch of science that deals with aging and the problems of aged persons.

Is Gerontological a word?

ger·on·tol·o·gy

The scientific study of the biological, psychological, and sociological phenomena associated with old age and aging. ge·ron′to·log′i·cal (jə-rŏn′tə-lŏj′ĭ-kəl), ge·ron′to·log′ic (-lŏj′ĭk) adj.

What do gerontologists do?

Gerontologists aren't medical doctors. They're professionals who specialize in issues of aging or professionals in various fields from dentistry and psychology to nursing and social work who study and may receive certification in gerontology.