pelv-
combining form 
or pelvi- or pelvo-
Etymology: International Scientific Vocabulary, from New Latin pelvis — more at pelvis 
1. : pelvis 
< pelvic >
< pelviscope >
2. : pelvic and 
< pelvisacral >
< pelvorenal >
or pelvi- or pelvo-
1.
< pelvic >
< pelviscope >
2.
< pelvisacral >
< pelvorenal >