Euphony, n.; pl. Euphonies.
Etymology: [L. euphonia, Gr. euphonie.]
A pleasing or sweet sound; an easy, smooth enunciation of sounds; a pronunciation of letters and syllables which is pleasing to the ear.
Shades of meaning
Fernald has no entry of its own for euphony; he lists it under meter.
Where he writes about it:
Euphony is agreeable linguistic sound, however produced; meter, measure, and rhythm denote agreeable succession of sounds in the utterance of connected words; euphony may apply to a single word or even a single syllable; the other words apply to lines, sentences, paragraphs, etc.; rhythm and meter may be produced by accent only, as in English, or by accent and quantity combined, as in Greek or Italian; rhythm or measure may apply either to prose or to poetry, or to music, dancing, etc.; meter is more precise than rhythm, applies only to poetry, and denotes a measured rhythm with regular divisions into verses, stanzas, strophes, etc. — from meter