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.
What is a corpus callosum? The corpus callosum (call o sum) is the largest connective pathway in a human brain. It is made of more than 200 million nerve fibers that connect the left and right sides (hemispheres) of the brain. If we cut a brain in half down the middle, we would also cut through the fibers of the corpus callosum.