euphonium

from WordNet (r) 3.0 (2006)
euphonium
    n 1: a bass horn (brass wind instrument) that is the tenor of
         the tuba family
    
from The Collaborative International Dictionary of English v.0.48
Euphonium \Eu*pho"ni*um\, n. [NL. See {Euphony}.] (Mus.)
   A bass instrument of the saxhorn family.
   [1913 Webster]
    

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