Pronunciation: (in-tes'tin),[key] —n. 1. Usually, intestines. the lower part of the alimentary canal, extending from the pylorus to the anus.
2. Also called small intestine. the narrow, longer part of the intestines, comprising the duodenum, jejunum, and ileum, that serves to digest and absorb nutrients.
3. Also called large intestine. the broad, shorter part of the intestines, comprising the cecum, colon, and rectum, that absorbs water from and eliminates the residues of digestion.