a. [f. Gr. εὐ- (see EU-) + ἁρμον-ία harmony + -IC.] Producing perfect harmony. In Euharmonic organ: see quots.
1811. Liston, Perfect Intonation, 27. The Euharmonic Organ is contrived … to enable the musician … to produce harmony absolutely perfect, while the keyboard remains the same as before.
1876. J. W. Moore, Dict. Mus. Inf., Euharmonic Organ, invented by Joseph Alley and H. W. Poole at Newbury Port, Mass., 1848. It gives all the tones of the ancient enharmonic scale.
