noun🔗ShareSynapsidesAny animal (including all mammals) of the class Synapsida."While dinosaurs ruled the land, synapsids, the ancestors of mammals, were evolving in the shadows. "Alors que les dinosaures régnaient sur la terre, les synapsides, ancêtres des mammifères, évoluaient dans l'ombre.animalbiologyorganismChat with AIVocabulary GamePractice Reading
