bass horn

from WordNet (r) 3.0 (2006)
bass horn
    n 1: the lowest brass wind instrument [syn: {bass horn},
         {sousaphone}, {tuba}]
from The Collaborative International Dictionary of English v.0.48
Bass horn \Bass" horn"\ (Mus.)
   A modification of the bassoon, much deeper in tone.
   [1913 Webster]
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