Definify.com

Webster 1913 Edition

‖

(lĭsˊsĕn-sĕf′ȧ-lȧ)

Noun.

pl.

[NL., fr. Gr.

λισσόσ

smooth +

ἐγκέφαλοσ

the brain.]

(Zool.)

A general name for all those placental mammals that have a brain with few or no cerebral convolutions, as Rodentia, Insectivora, etc.