/ kəʊˈiːvl; NAmE koʊ-/ adjective
( formal ) coeval (with sth) ( of two or more things ) having the same age or date of origin :
The industry is coeval with the construction of the first railways.
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WORD ORIGIN
early 17th cent. (as a noun): from late Latin coaevus , from co- jointly + Latin aevum age.