quinquagenarian

adj.五十岁至六十岁之间的n.五十多岁的人

a person who is between 50 and 59 years old

名词

1. Many quinquagenarians have reached the peak of their careers.
许多五十多岁的人已经达到了事业的巅峰。

2. She still enjoys running marathons at her age as a quinquagenarian.
作为一个五十多岁的人，她仍然喜欢参加马拉松比赛。