PERIGONE

Per″i‐gone (?), n. [[Pref. peri- + Gr. � productive organs.]] 1. 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. 2. (Zoöl.) A sac which surrounds the generative bodies in the gonophore of a hydroid.