A new study in the Journal of the American Geriatrics Society looked at this question by examining the personality characteristics of 246 children of people who had lived to be at least 100.
2016年6月四级真题（第三套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
ADJ
老年病学的；老年医学的
Geriatric is used to describe things relating to the illnesses and medical care of old people.
Geriatrics is the study of the illnesses that affect old people and the medical care of old people.
N-COUNT
老家伙，老头子，老朽（可能具有冒犯意味）
If you describe someone as a geriatric, you are implying that they are old and that their mental or physical condition is poor. This use could cause offence.