Cul-de-___
I believe the answer is:
sac
(Other definitions for sac that I've seen before include "Bag, pouch; cyst" , "Bag-like cavity" , "Pouch in the body" , "Bodily cavity enclosed by a membrane" , "Pouch or bag-like structure" .)
I believe the answer is:
sac
(Other definitions for sac that I've seen before include "Bag, pouch; cyst" , "Bag-like cavity" , "Pouch in the body" , "Bodily cavity enclosed by a membrane" , "Pouch or bag-like structure" .)