Relating to the lips and the teeth; denoting certain letters the sound of which is formed by both lips and teeth. [labio- + L. dens, tooth]
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la·bio·den·tal .lā-bē-ō-'dent-əl adj uttered with the participation of the lip and teeth <the \labiodental sounds /f/ and /v/>
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la·bio·den·tal (la″be-o-denґtəl) 1. pertaining to the lips and teeth. 2. a speech sound produced by the contact of the lips and teeth, such as f and v.Medical dictionary. 2011.