n, pl  -ter*ies  1  :  one or more vertebrate membranes that consist of a double fold of the peritoneum and invest the intestines and their appendages and connect them with the dorsal wall of the abdominal cavity : specif  :  such membranes connected with the jejunum and ileum in humans  2  :  a fold of membrane comparable to a mesentery and supporting a viscus (as the heart) that is not a part of the digestive tract .
 
   
 
Similar sounding terms:  mesentera 
 
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