noun🔗ShareAny animal (including all mammals) of the class Synapsida."Paleontologists studying early mammal evolution classify the ancient Dimetrodon as a synapsid, a group distinguished by a single opening in the skull behind the eye. "animalbiologyorganismanatomyChat with AIVocabulary GamePractice Reading
adjective🔗SharePertaining to the class Synapsida, of animals which have an opening low in the skull roof behind each eye, leaving a bony arch beneath each."The paleontologist explained that the fossil skull exhibited a synapsid characteristic: a single opening behind each eye socket. "anatomybiologyanimalorganismscienceChat with AIVocabulary GamePractice Reading
