periton-
combining form 
or peritone- or peritoneo-
Etymology: Late Latin peritoneum 
1. : peritoneum 
< peritonealgia >
< peritoneoplasty >
< peritonitis >
2. : peritoneal and 
< peritoneomuscular >
< peritoneopericardial >
or peritone- or peritoneo-
1.
< peritonealgia >
< peritoneoplasty >
< peritonitis >
2.
< peritoneomuscular >
< peritoneopericardial >