Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A taxonomic class within the subphylum Radiozoa — 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..

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

New Latin, Ancient Greek πολύς (polys, "many") + κύστις (kustis, "bladder") + -ina

Examples

  • With regard to organisms, however, the wonderful Acanthometræ and the Polycystina may be mentioned as presenting complexities of form which can hardly be thought to be due to other than _internal_ causes.

    On the Genesis of Species

  • No power on earth can make these little urns of the _Polycystina_ except

    Natural Law in the Spiritual World

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