labiodental
adjective/ˌleɪbiəʊˈdentl/
/ˌleɪbiəʊˈdentl/
(phonetics)- (of a speech sound) made by placing the top teeth against the bottom lip, for example /f/ and /v/ in fan and van
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labiodental
Definition of labiodental adjective from the Oxford Advanced Learner's Dictionary