Polycystina

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Polycystina \Pol`y*cys*ti"na\, n. pl. [NL. See {Poly-}, and
     {Cyst}.] (Zool.)
     A division of Radiolaria including numerous minute marine
     species. The skeleton is composed of silica, and is often
     very elegant in form and sculpture. Many have been found in
     the fossil state.


     [1913 Webster]