labial

US /ˈleɪ.bi.əl/
UK /ˈleɪ.bi.əl/
"labial" picture
1.

relating to the lips or labia

:
She applied a moisturizing labial balm.
The doctor examined the patient's labial area.
2.

(of a consonant) articulated with the lips

:
The sounds /p/, /b/, and /m/ are examples of labial consonants.
In phonetics, a labial sound involves the use of the lips.
1.

a consonant articulated with the lips

:
The phonologist identified the sound as a labial.
Many languages have several different labials.