'Polycystina' definitions:
Definition of 'Polycystina'
- 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]
