gyrus - a convex fold or elevation in the surface of the brainfrontal gyrus - any of the convolutions of the outer surface of the frontal lobe of the cerebrum temporal gyrus - any of the convolutions of the outer surface of the temporal lobe of the cerebrum parietal gyrus - any of the convolutions of the outer surface of the parietal lobe of the cerebrum occipital gyrus - any of the convolutions of the outer surface of the occipital lobe of the cerebrum cerebrum - anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans central gyrus - either of two gyri on either side of the central sulcus |