labial
1. la.bi.al \'la--be--*l\ \-*-le-\ aj 1: of or relating to the lips or labia 2: giving its tones from impact of an air current on a lip {a ~ in strument} 3: uttered with the participation of one or both lips {the ~ sound s /f/, /p/, and /u:/} - la.bi.al.ly av 2. labial n 1: FLUE PIPE 2: a labial consonant