n. (Zool.)
‖n. pl. [ NL. See Poly-, and Cystidea. ] (Zool.) A division of Gregarinæ including those that have two or more internal divisions of the body. [ 1913 Webster ]
‖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 ]
a. (Zool.) Pertaining to the Polycystina. --
[ 1913 Webster ]