SINCE 1828
proctodeum
noun
proc·to·de·um
variants:
or proctodaeum \ˌpräk-tə-ˈdē-əm
\
\
plural -dea
or proctodaea\-ˈdē-ə
\
or proctodeums
or -daeums
\
or proctodeums
or -daeums
Medical Definition of proctodeum
: the posterior ectodermal part of the digestive tract formed in the embryo by invagination of the outer body wall
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