obturator
Concise Oxford English Dictionary © 2008 Oxford University Press:
obturator /ˈɒbtjʊəreɪtə/
▶noun Anatomy either of two muscles covering the outer front part of the pelvis on each side and involved in movements of the thigh and hip.
– origin C18: from med. L., lit. ‘obstructor’, from obturare ‘stop up’.
'obturator' also found in these Oxford entries:

