n. (Zool.) (a) One of the Polycystidea. (b) One of the Polycystina. -- a. Pertaining to the Polycystidea, or the Polycystina. [ 1913 Webster ]

‖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 ]