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.
The corpus callosum is a major structure permitting exchange of information between the two hemispheres, or halves, of the brain. In some children, seizures may spread from one hemisphere to the other through the corpus callosum.