fissure of sylvius

noun

1. lateral fissure.

noun

1. a deep horizontal cleft in each cerebral hemisphere: marks the separation of the temporal lobe from the frontal and parietal lobes

n.

1. The deepest and most prominent of the cortical fissures of the brain, extending between frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere.lateral cerebral sulcus