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. Zool.
A sac which surrounds the generative bodies in the gonophore of a hydroid.
© Webster 1913.