a consonant whose articulation involves movement of the lips
<noun.communication> [ adj ]
of or relating to the lips of the mouth
<adj.pert> labial stops
relating to or near the female labium
<adj.pert>
Labial \La"bi*al\, a. [LL. labialis, fr. L. labium lip: cf. F. labial. See {Lip}.] 1. Of or pertaining to the lips or labia; as, labial veins.
2. (Mus.) Furnished with lips; as, a labial organ pipe.
3. (Phonetics) (a) Articulated, as a consonant, mainly by the lips, as b, p, m, w. (b) Modified, as a vowel, by contraction of the lip opening, as [=oo] (f[=oo]d), [=o] ([=o]ld), etc., and as eu and u in French, and ["o], ["u] in German. See Guide to Pronunciation, [sect][sect] 11, 178.
4. (Zo["o]l.) Of or pertaining to the labium; as, the labial palpi of insects. See {Labium}.
Labial \La"bi*al\, n. 1. (Phonetics) A letter or character representing an articulation or sound formed or uttered chiefly with the lips, as {b}, {p}, {w}.
2. (Mus.) An organ pipe that is furnished with lips; a flue pipe.
3. (Zo["o]l.) One of the scales which border the mouth of a fish or reptile.