A roast beef sandwich on white bread is a deli classic. Usually made with beef from the round, or hind leg, section of the cow -- roast beef is one of the leaner cuts of beef with fewer calories than fattier sections. Video of the Day
corpus callosum. a great band of deeply situated transverse white fibers uniting the two halves of the cerebrum in humans and other mammals.
corpus callosum in Medicine. corpus callosum corpus calÂ·loÂ·sum (kÉ-lÅ'sÉm) n. The commissural plate of nerve fibers connecting the two cerebral hemispheres except for most of the temporal lobes. Also called commissure of cerebral hemispheres.