1. pertaining to the Gyrencephala.
2. having cerebral hemispheres marked by convolutions.
Denoting brains, such as that of humans, in which the cerebral cortex has convolutions, in contrast to the lissencephalic (smooth) brains of small mammals (for example, rodents).
[G. gyros, ring (gyrus), + enkaphalē, brain]
gyrencephalic(jī-rĕn-sĕ-făl′ĭk) [″ + enkephale, head]
Having a brain marked by numerous convolutions.