American English

Definition of phono- combining form from the Oxford Advanced American Dictionary

 

phono-

 combining form
combining form
NAmE//ˈfoʊnoʊ//
 
, NAmE//ˈfoʊnə//
 
(also phon-)
 
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(in nouns, adjectives, and adverbs) connected with sound or sounds phonetic
See the Oxford Advanced Learner's Dictionary entry: phono-