Pe*rip"ter*y (?), n. [Gr. &?; flying round about.] The region surrounding a moving body, such as the wing of a bird or a gliding aëroplane, within which cyclic or vortical motion of the air occur.

Pe*rip"ter*y (?), n. [Gr. &?; flying round about.] The region surrounding a moving body, such as the wing of a bird or a gliding aëroplane, within which cyclic or vortical motion of the air occur.