la•bi•o•den•talPronunciation: (lā"bē-ō-den'tl), [key] Phonet.
articulated with the lower lip touching the upper front teeth, as f
or, rarely, with the upper lip touching the lower front teeth.
a labiodental speech sound.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.