I. ˈlā-bē-əl adjective
Etymology: Medieval Latin labialis, from Latin labium lip
Date: 1594
1. : uttered with the participation of one or both lips
the labial sounds f, p, and ü
2. : of, relating to, or situated near the lips or labia
• la·bi·al·ly -ə-lē adverb
II. noun
Date: 1668
: a labial consonant