adjective / noun
labial
LAY-bee-ul/ˈleɪbiəl/
Of the lips or their use in forming sounds.
The balm provides labial care as the man applies it directly to his lower lip.

Etymology
The lip root and relational ending make labial an adjective for things connected with the lips. Anatomical usage extends it to lip-like parts as well.
In context
the labial view is the lip view
More examples
- The first sound in 'map' is a labial.
- The labial sound 'f' uses the lower lip and upper teeth.
- The doctor examines the labial tissue for signs of injury.
Forms
labial · labials
labialize verb — To pronounce with added lip rounding.
Similar words
- bilabial
- Specifically involves both lips, rather than one or both.
- labiodental
- Specifically involves the lower lip touching the upper teeth.