[kon-truh-ba-soon, -buh-] 
| a bassoon larger in size and an octave lower in pitch than the ordinary bassoon; a double bassoon. |
| con·tra·bas·soon (kŏn'trə-bə-sōōn', -bā-) n. The largest and lowest pitched of the double-reed wind instruments, sounding an octave below the bassoon. Also called double bassoon. |
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