'Gyrus' definitions:

Definition of 'gyrus'

(from WordNet)
noun
A convex fold or elevation in the surface of the brain [syn: gyrus, convolution]

Definition of 'Gyrus'

From: GCIDE
  • Gyrus \Gy"rus\ (j[imac]"r[u^]s), n.; pl. Gyri (j[imac]"r[imac]). [L. See Gyre, n.] A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain. [1913 Webster]