noun🔗Share単弓類Any animal (including all mammals) of the class Synapsida."While dinosaurs ruled the land, synapsids, the ancestors of mammals, were evolving in the shadows. "恐竜が陸を支配していた頃、哺乳類の祖先である単弓類は影で進化していました。animalbiologyorganismChat with AIVocabulary GamePractice Reading
