The lower of two boards forming an organ bellows or wind-chest.

On an organ: any one of the folding wooden parts of a hinged leather-and-wood bellows. Now chiefly historical.

(see quot.).

One who or that which supplies material for consumption or elaboration. The lower chamber in an organ bellows which supplies the upper chamber or…

(a) (in singular and plural) either side of a person's ribcage or torso; (b) any of various rib-like pieces or parts at the side of an object or…

The upper part of the soundboard of an organ, situated above the soundboard bars and grooves and perforated with holes for admitting air to the…