The Collaborative International Dictionary of English v.0.48:
Euphonous \Eu"pho*nous\, n. Euphonious. [R.] [1913 Webster]WordNet (r) 3.0 (2006):
euphonous adj 1: having a pleasant sound; "a euphonious trill of silver laughter" [syn: euphonious, euphonous] [ant: cacophonic, cacophonous]