
• (n. pl.) The higher orders of Mammalia, in which the cerebrum is convoluted.
Found on
http://thinkexist.com/dictionary/meaning/gyrencephala/

(ji″rәn-sef´ә-lә) a group of higher mammals, including humans and other primates, having cerebral hemispheres marked by convolutions.
Found on
http://www.encyclo.co.uk/local/21001
Gyr`en·ceph'a·la (jĭr`ĕn*sĕf'ȧ*lȧ)
noun plural [ New Latin from Greek
gyro`s round +
'egke`falos the brain.]
(Zoology) The higher orders of Mammalia, in which the cerebrum is convoluted. --
Gyr`en*ceph'a*lous (-lŭs)...
Found on
http://www.encyclo.co.uk/webster/G/71

Gyrencephala is one of the four subclasses into which Owen divided the mammalia, characterized by having the hemispheres of the cerebrum covering the greater part of the cerebellum and the olfactory lobes. It comprehends the Quadrumana, Carnivora, Artiodactyla, Perissodactyla, Proboscidea, Sirenia, and Cetacea.
Found on
http://www.probertencyclopaedia.com/browse/BGA.HTM
No exact match found.