Definition of midguts:
(n) :
(biology, anatomy, medicine) The developed counterpart in the adult: the intermediate part of the alimentary canal, which in humans runs from the second half of the duodenum through the proximal two-thirds of the transverse colon.
(n) :
(biology, anatomy, embryology) The central loop of the alimentary canal of an embryo between the foregut and the hindgut, in humans and some other animals.