accordion

from WordNet (r) 3.0 (2006)

accordion
    n 1: a portable box-shaped free-reed instrument; the reeds are
         made to vibrate by air from the bellows controlled by the
         player [syn: {accordion}, {piano accordion}, {squeeze box}]

from The Collaborative International Dictionary of English v.0.48

Accordion \Ac*cor"di*on\, n. [See {Accord}.] (Mus.)
   A small, portable, keyed wind instrument, whose tones are
   generated by play of the wind upon free metallic reeds.
   [1913 Webster]

from The Devil's Dictionary (1881-1906)

ACCORDION, n.  An instrument in harmony with the sentiments of an
assassin.

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