Harmoniphon \Har*mon"i*phon\ (h[aum]r*m[o^]n"[i^]*f[o^]n), n.
[Gr. "armoni`a harmony + fwnh` sound.] (Mus.)
An obsolete wind instrument with a keyboard, in which the
sound, which resembled the oboe, was produced by the
vibration of thin metallic plates, acted upon by blowing
through a tube.
[1913 Webster]