1. existing or occurring at the same time; contemporary
Usage: formal

Examples

• The two civilizations were coetaneous, developing similar technologies independently.
• These coetaneous events shaped the political landscape of the era.
• The fossils found in the same rock layer are coetaneous specimens.
• Several coetaneous manuscripts confirm the historical account.
• The coetaneous rise of these movements was not coincidental.
• Researchers studied coetaneous cultural developments across different continents.