bas·soon (bə-sōōn', bā-) n. A low-pitched woodwind instrument with a double reed, having a long wooden body attached to a U-shaped lateral tube that leads to the mouthpiece. The range of this instrument is typically two octaves lower than that of the oboe.
[French basson, from Italian bassone, augmentative of basso, bass; see basso.] bas·soon'ist n.
The second largest and second lowest pitched of the woodwinds. (The less common contrabassoon is larger and has a lower pitch.) It is played with a double reed.