Labial

Part of speech: noun (n.)

1. A letter or character representing an articulation or sound formed or uttered chiefly with the lips, as b, p, w.

2. An organ pipe that is furnished with lips; a flue pipe.

3. One of the scales which border the mouth of a fish or reptile.

Part of speech: adjective (a.)

1. Of or pertaining to the lips or labia; as, labial veins.

2. Furnished with lips; as, a labial organ pipe.

3. Articulated, as a consonant, mainly by the lips, as b, p, m, w.

4. Modified, as a vowel, by contraction of the lip opening, as oo (food), o (old), etc., and as eu and u in French, and ö, ü in German. See Guide to Pronunciation,

5. Of or pertaining to the labium; as, the labial palpi of insects. See Labium.