n. sing. & pl. [ OE. bely, below, belly, bellows, AS. bælg, bælig, bag, bellows, belly. Bellows is prop. a pl. and the orig. sense is bag. See Belly. ] An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind. [ 1913 Webster ]
Bellows camera,
Hydrostatic bellows.
A pair of bellows,
(Zool.) A European fish (Centriscus scolopax), distinguished by a long tubular snout, like the pipe of a bellows; -- called also