A twisted shape.
Turn, fold, or coil of anything; also, convex fold or ridge in the surface of the brain.
Folds separated by depressions.
A folding or twisting, such as one of the many that cause the fissures, sulci, and gyri of the surface of the cerebrum.
A folding of an organ back onto itself, typically used when describing the convoluted appearance of the brain’s surfaces.