articulated with the lower lip touching the upper front teeth, as f or v, or, rarely, with the upper lip touching the lower front teeth.
a labiodental speech sound.
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British Dictionary definitions for labiodental
pronounced by bringing the bottom lip into contact or near contact with the upper teeth, as for the fricative (f) in English fat, puff
a labiodental consonant
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012