What is "proliferous cyst"

Proliferous \Pro*lif"er*ous\, a. [L. proles offspring + -ferous.]

1. (Bot.) Bearing offspring; -- applied to a flower from within which another is produced, or to a branch or frond from which another rises, or to a plant which is reproduced by buds or gemm[ae].

2. (Zo["o]l.)

   1. Producing young by budding.

   2. Producing sexual zooids by budding; -- said of the blastostyle of a hydroid.

   3. Producing a cluster of branchlets from a larger branch; -- said of corals.

      Proliferous cyst (Med.), a cyst that produces highly-organized or even vascular structures.
      --Paget. [1913 Webster] -- Pro*lif"er*ous*ly, adv.