Plate-of-wind.
（Music.) In the construction of organ-pipes, a thin aperture whence a sheet of air issues, impinging upon the lip of the mouth and receiving a vibration which is imparted to the column of air in the pipe. See pipe; mouth-pipe. The word is sometimes applied to the issuing stream of air, which is flattened by the surfaces between which it passes, so as to impinge as a ribbon of air upon the edge of the lip.
