attrib.
1- of or relating to old people, especially with regard to their health care（与）老年保健（有关）的; 老年人的：
a geriatric hospital.
老年医院。
1.1
- informal decrepit; out of date〈非正式〉衰老的; 过时的：
replacements for a geriatric locomotive fleet.
破旧机车队的更新。
- an old person, especially one receiving special care（尤指接受特别护理的）老年人：
a rest home for geriatrics.
养老院。
USAGE
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.
词源
1920s: from Greek gēras 'old age' + iatros 'doctor', on the pattern of paediatric.