Source : Webster's Revised Unabridged Dictionary (1913)

Perigone \Per"i*gone\, n. [Pref. peri- + Gr. ? productive
   organs.]
   1. (Bot.)
      (a) Any organ inclosing the essential organs of a flower;
          a perianth.
      (b) In mosses, the involucral bracts of a male flower.

   2. (Zo["o]l.) A sac which surrounds the generative bodies in
      the gonophore of a hydroid.

Source : WordNet®

perigone
     n : collective term for the outer parts of a flower consisting
         of the calyx and corolla and enclosing the stamens and
         pistils [syn: {perianth}, {chlamys}, {floral envelope}, {perigonium}]