bi|la|bi|al

bi|la|bi|al «by LAY bee uhl», adjective, noun.

–adj.

1. formed by both lips; articulated by bringing the lips close together, as for English w, or completely together, as for English p, b, m.

2. bilabiate; having two lips.

–n.

Phonetics. a sound formed by both lips. B, p, m, and w are bilabials.