polycystidea

from The Collaborative International Dictionary of English v.0.48

Polycystidea \Pol`y*cys*tid"e*a\, n. pl. [NL. See {Poly-}, and
   {Cystidea}.] (Zool.)
   A division of Gregarin[ae] including those that have two or
   more internal divisions of the body.
   [1913 Webster]