| labiodental | Relating to the lips and the teeth; denoting certain letters the sound of which is formed by both lips and teeth. Origin: Labio-+ L. Dens, tooth (05 Mar 2000) |
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| labiodental sulcus | A furrow between the developing lip and gum. Synonym: labiodental sulcus, lip sulcus, primary labial groove. (05 Mar 2000) |