geriatric
Pronunciation: /ˌdʒɛrɪˈatrɪk/
adjective

Origin:
1920s: from Greek gēras 'old age' + iatros 'doctor', on the pattern of paediatric

Geriatric is the normal, semi-official term used in Britain and the US when referring to the health care of old people ( a geriatric ward; geriatric patients). When used outside such contexts, it typically carries overtones of being worn out and decrepit and can therefore be offensive if used with reference to people.