adj 1  :  of, belonging to, or affecting the abdomen < organs>  < pain>  < surgery>   2  :  performed by entry through the abdominal wall <an hysterectomy>  ab*dom*i*nal*ly adv 
, n :  an abdominal muscle (as an oblique or a rectus abdominis) esp. of the anterolateral region - usu. used in pl. .
 
 
 
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