gut

(gut). The intestine or bowel. 2. Catgut. fore-g., head-g. +» an embryonic organ whence are derived the pharynx, esophagus, stomach, and duodenum. hind-g., the lower part of the embryonic alimentary tract which develops into the colon. miid-g., the me so gaster. tail-g., a prolongation of the archenteron into the tail of the early embryo.