"having the same age," formed in English early 17c. from Late Latin coaevus, from Latin com- "equal" (see co-) + aevum "an age" (see eon). As a noun from c. 1600.
权威例句
1. The industry is coeval with the construction of the first railways.
这一产业和初期铁路的建造相伴而生。
2. Analysis has proved that this document is coeval with that one.