Noun
English Wikipedia has an article on:culdocentesisWikipedia
culdocentesis (countable and uncountable, plural culdocenteses)
(medicine) A diagnostic procedure in which fluid from the rectouterine pouch is extracted, via the vagina, using a needle.
Culdocentesis will differentiate hemoperitoneum (ruptured ectopic pregnancy or hemorrhagic cyst ) from pelvic sepsis (salpingitis, ruptured pelvic abscess, or ruptured appendix). Source: Internet