Gyrencephala

Gyr`en`ceph´a`la

    (jĭr`ĕn`sĕf´å`lå)

n. pl.

1.

(Zool.) The higher orders of Mammalia, in which the cerebrum is convoluted.

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.