labial

Of or relating to the lips or labia.

Articulated mainly by closing or partly closing the lips, as the sounds (b), (m), or (w).

A labial consonant.

In anatomy and zoology, pertaining to the lips or to a lip-like part; situated on or by a lip; having a lip-like character, as in shape, position, or office: as, a labial vessel or nerve; a labial fold or process.

In entomology, pertaining to the labium, or lower lip of an insect.

Formed by the lips, as a sound. See II., 1.

Giving forth tones produced by the impact of a stream of air upon a sharp edge or lip: applied to musical instruments such as the flute or the flue-pipes of an organ.

A letter or character representing an articulate sound which in speaking is accompanied by a proximate or complete closure of the lips.

In herpetology, one of a series of plates or scales which lie along the edge of the lips, especially in Ophidia, those of the upper lip being the superior labials, those of the lower lip the inferior labials.