rectouterine pouch
noun
rec·to·uter·ine pouch
| \ ˌrek-tō-ˈyu̇t-ə-ˌrīn-, -rən-
\
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Medical Definition of rectouterine pouch
: a sac between the rectum and the uterus that is formed by a folding of the peritoneum — compare rectovesical pouch