Labial consonants are consonants in which one or both lips are the
active articulator. They generally preclude
linguolabials, in which the tip of the
tongue contacts the posterior side of the upper lip, making them
coronals, but sometimes, they behave as labial consonants. The two common labial articulations are
bilabials, articulated using both lips, and
labiodentals, articulated with the lower lip against the upper teeth, both of which are present in
English. The other labial articulation is
dentolabials, articulated with the upper lip against the lower teeth (the reverse of labiodental), normally only found in pathological speech.