Webster's English Dictionary

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abdomen

ab.do.men \'ab-d*-m*n, ab-'do--m*n\ \ab-'da:m-*n-*l\ \-e-\ n [MF & L; MF, 
   fr. L] 1: the part of the body between the thorax and the pelvis; also : t 
   he cavity of this part of the trunk containing the chief viscera 2: the 
   posterior section of the body behind the thorax in an arthropod  - 
   ab.dom.i.nal aj