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.
divided into right and left halves, called cerebral hemispheres. If we pry apart the two halves of the brain, we see that this fissure descends to a structure called the corpus callosum. The largest and most complex part of the human brain - includes the brain areas that are responsible for our most complex mental activities, including learning, remembering, thinking, and consciousness.