- having the same age or date of origin; contemporary同年龄的; 同时期的; 同时代的：
these lavas were coeval with the volcanic activity.
这些火山岩和那次火山活动是同时期的。
- a person of roughly the same age as oneself; a contemporary.年龄相近的人; 同时代的人。
派生词
coevality
nouncoevally
adverb词源
early 17th cent. (as a noun)： from late Latin coaevus, from co- 'jointly, in common' + Latin aevum 'age'.