D defs.my
Entry 1 sense Webster, 1913

Polycystina

· Pol·y·cys·ti·na · IPA
01 n. pl. A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form an…
  1. 1.
    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.(Zool.)