LISSENCEPHALA

‖Lis′sen‐ceph″a‐la (lĭs′sĕn‐sĕf″ȧ‐lȧ), n. pl. [[NL., fr. Gr. λισσόσ smooth + εγκἔφαλοσ the brain.]] (Zoöl.) A general name for all those placental mammals that have a brain with few or no cerebral convolutions, as Rodentia, Insectivora, etc.