duodenum

from WordNet (r) 3.0 (2006)

duodenum
    n 1: the part of the small intestine between the stomach and the
         jejunum

from The Collaborative International Dictionary of English v.0.48

Duodenum \Du`o*de"num\, n. [NL., fr. duodeni twelve each: cf. F.
   duodenum. So called because its length is about twelve
   fingers' breadth.] (Anat.)
   The part of the small intestines between the stomach and the
   jejunum. See Illust. of Digestive apparatus, under
   {Digestive}.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

43 Moby Thesaurus words for "duodenum":
      abdomen, anus, appendix, blind gut, bowels, brain, cecum, colon,
      endocardium, entrails, foregut, giblets, gizzard, guts, heart,
      hindgut, innards, inner mechanism, insides, internals, intestine,
      inwards, jejunum, kidney, kishkes, large intestine, liver,
      liver and lights, lung, midgut, perineum, pump, pylorus, rectum,
      small intestine, spleen, stomach, ticker, tripes,
      vermiform appendix, viscera, vitals, works

[email protected]