n. [ Pref. peri- + Gr. &unr_; 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. [ 1913 Webster ]

2. (Zool.) A sac which surrounds the generative bodies in the gonophore of a hydroid. [ 1913 Webster ]

{ } n. [ NL. perigeum, fr. Gr. peri` about, near + gh^ the earth: cf. F. périgée. ] (Astron.) That point, in the orbit of the moon or other body orbiting the earth, which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of bodies not orbiting the earth, such as of a comet, a planet, etc. Called also epigee, epigeum. [ 1913 Webster +PJC ]