Mus. [ad. Gr. εὔφωνον, neut. of εὔφωνος: see EUPHONY.] A musical instrument (see quot. 1842) that resembled the upright piano in form and the organ in tone.

1

1824.  Specif. Patent, No. 4994. These said frames are to be placed as nearly as possible to the strings of the pianofortes and the euphonons.

2

1842.  A. Savage, in Mech. Mag., XXXVII. 563. When describing the claviol I ought to have mentioned … the euphonon. In this instrument the strings are of steel wire … put into vibration by an endless band, acting as a bow, one band to each string.

3