Labial

[ley-bee-uh l] /ˈleɪ bi əl/

adjective
1.
of, relating to, or resembling a .
2.
of or relating to the lips.
3.
Phonetics. involving lip articulation, as p, v, m, w, or a rounded vowel.
4.
Music. having the tones produced by the impact of a stream of air on a sharp liplike edge, as in a flute or the flue pipes of an organ.
noun, Phonetics.
5.
any labial consonant, especially a .
6.
any labial sound.
/ˈleɪbɪəl/
adjective
1.
of, relating to, or near lips or labia
2.
(music) producing sounds by the action of an air stream over a narrow liplike fissure, as in a flue pipe of an organ
3.
(phonetics) relating to a speech sound whose articulation involves movement or use of the lips: a labial click
noun
4.
(music) Also called labial pipe. an organ pipe with a liplike fissure
5.
(phonetics) a speech sound such as English p or m, whose articulation involves movement or use of the lips
adj.

“pertaining to the lips,” 1590s, from Medieval Latin labialis “having to do with the lips,” from Latin labium “lip” (see lip (n.)). The noun meaning “a labial sound” is from 1660s. Related: Labially.

labial la·bi·al (lā’bē-əl)
adj.
Relating to the lips or labia.