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.
Noun. 1. corpus luteum-yellow endocrine tissue that forms in a ruptured Graafian follicle following the release of an ovum; it degenerates after a few days unless pregnancy has begun. ductless gland, endocrine gland, endocrine-any of the glands of the endocrine system that secrete hormones directly into the bloodstream.