labiodental UK /ˌleɪ.bi.əʊˈdɛn.təl/US /ˌleɪ.bi.oʊˈdɛn.təl/adjective 1noun 1forms 1 adjective1 •articulated with the lower lip and upper teeth./f/ and /v/ are labiodental consonants. noun1 •A consonant articulated with the lower lip and upper teeth. formslabiodentals