coetaneous
/ˌkoʊɪˈteɪniəs/
adjective
- Existing or occurring at the same time; contemporary.
- The invention of the printing press was coetaneous with major changes in European society.
- These fossils are coetaneous with the first known dinosaurs from the same geological period.
- The two ancient civilizations were coetaneous, flourishing side by side for centuries.
Synonyms