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.
Definition of callus. 1  1 : a thickening of or a hard thickened area on skin or bark. 2  2 : a mass of exudate and connective tissue that forms around a break in a bone and is converted into bone in healing. 3  3 : soft tissue that forms over a wounded or cut plant surface.