contemporaneous

adj

1. (not-comparable)Existing or created in the same period of time.

   “Look in other contemporaneous works to see whether that idea was common then.”

   “You know that Meroïtic is an ancient Nubian writing system of the third, or fourth century B.C., and is a script which conceals a typically African language. […] [I]f this script is deciphered, we will have in that respect the testimony of an African language which goes back 2,400 years, that is to say [back to a period] fairly contemporaneous with Latin and other languages of antiquity.”

   “Preceded by a Simpsons short shot in 3-D—perhaps the only thing more superfluous than a fourth Ice Age movie—Ice Age: Continental Drift finds a retinue of vaguely contemporaneous animals coping with life in the post-Pangaea age.”