Source : Webster's Revised Unabridged Dictionary (1913)

Pancreas \Pan"cre*as\, n. [NL., fr. Gr. ?; ?, ?, all + ? flesh,
   meat: cf. F. pancr['e]as.] (Anat.)
   The sweetbread, a gland connected with the intestine of
   nearly all vertebrates. It is usually elongated and
   light-colored, and its secretion, called the pancreatic
   juice, is discharged, often together with the bile, into the
   upper part of the intestines, and is a powerful aid in
   digestion. See Illust. of {Digestive apparatus}.

Source : WordNet®

pancreas
     n : a large elongated exocrine gland located behind the stomach;
         secretes pancreatic juice and insulin