ge·ri·at·rics /ˌdʒeriˈætrɪks/ noun [uncountableU] MHOLD/NOT YOUNGthe medical treatment and care of old people 老年医学,老年病学 → gerontologyn Geriatrics is followed by a singular verb: Geriatrics is a growth area of medicine.
—geriatrician /ˌdʒeriəˈtrɪʃən/ noun [countableC]