Longman Dictionary of Contemporary English
phono-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ a phonograph
▪ phonology
The Collaborative International Dictionary
Phono-
Phono- \Pho"no-\ A combining form from Gr. ? sound, tone; as, phonograph, phonology.
Douglas Harper's Etymology Dictionary
phono-
word-forming element meaning "sound, voice," from Greek phono-, comb. form of phone "voice, sound" (see fame (n.)).
Wiktionary
phono-
pre. Relating to sound