adjective.
Articulated with the lower lip and upper teeth, as the sounds (f) and (v).
noun.
A labiodental sound.
The Century Dictionary and Cyclopedia
Formed or pronounced by the coöperation of the lips and the teeth.
noun.
An articulate sound produced by the coöperation of the lips and the teeth, or the letter or character representing such sound. The labiodentals are f and verb
the GNU version of the Collaborative International Dictionary of English
adjective.
Formed or pronounced by the cooperation of the lips and teeth, as f and v.
adjective.articulated with the lower lip and upper teeth
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a consonant whose articulation involves the lips and teeth
Word Usage
"By that time, Olson apparently was still convinced that this phoneme wasn't a labio-dental flap: The bilabial flap is a sound very similar to what is elsewhere called the labiodental flap, but the articulation is slightly different."