bilabial

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

a consonant that is articulated using both lips;
/p/ or /b/ or /w/
• Hypernyms:
labial consonant, labial

II - adjective

of or relating to or being a speech sound that is articulated using both lips
- bilabial fricatives
• Pertains to noun:
labial