Labiodental fricative

From Teflpedia

A labiodental fricative (/ˈlæbɪ(j)əʊˈdentəl ˈfrɪkətɪv/) is a fricative (a type of consonant sound) formed with . There are two of these in the standard English phonemes, which form a consonant pair; the unvoiced labiodental fricative /f/ and the voiced labiodental fricative /v/.