Redia \Re"di*a\ (r?"d?*?), n.; pl. L. {Rediae} (-[=e]), E.
{Redias} (-?z). [NL.; of uncertain origin.] (Zool.)
A kind of larva, or nurse, which is prroduced within the
sporocyst of certain trematodes by asexual generation. It in
turn produces, in the same way, either another generation of
rediae, or else cercariae within its own body. Called also
{proscolex}, and {nurse}. See Illustration in Appendix.
[1913 Webster]