The Collaborative International Dictionary of English v.0.48:

Euphony \Eu"pho*ny\, n.; pl. Euphonies. [L. euphonia, Gr. ?,
   fr. ? sweet-voiced; e'y^ well + ? sound, voice; akin to ? to
   speak: cf. F. euphonie.]
   A pleasing or sweet sound; an easy, smooth enunciation of
   sounds; a pronunciation of letters and syllables which is
   pleasing to the ear.
   [1913 Webster]