Gyrus

[dʒairәs]

(noun.) a convex fold or elevation in the surface of the brain.

Edited by Hattie--From WordNet

(n.) A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain.

Inputed by George

n. one of the rounded edges into which the surface of the cerebral hemisphere is divided by the fissures or sulci.

Typist: Wilhelmina