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Medical Definition of Intestinum
1. 1. The digestive tube passing from the stomach to the anus. It is divided primarily into the intestinum tenue (small intestine) and the intestinum crassum (large intestine). Synonym: bowel, intestine. 2. Inward; inner. Origin: neuter of intestinus Synonym: gut. Origin: L. Intestinus, internal, ntr. As noun, the entrails, fr. Intus, within (05 Mar 2000)