pri·mo·genial \|prī(ˌ)mō, -_mə+\adjective Etymology: modification (influenced by Late Latin primogenitalis primogenital) of Latin primigenius primogenial (from primus first + -genius — from gignere to beget — ) + English -al 1.alsopri·mi·genial\|prīmə+\: first formed or generated : original, primitive 2.: primogenitary