noun
therapsids
Scientific term for an extinct group of synapsids that includes the ancestors of mammals. Used in paleontology and evolutionary biology.
獣弓類は哺乳類の祖先を含むグループです。
Therapsids are a group that includes the ancestors of mammals.
Compound of 獣 (beast), 弓 (bow, arch), and 類 (kind, group). The name likely refers to the arched structure of the cheekbone or temporal region characteristic of therapsid skulls. The exact derivation is uncertain.