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bilabial

[bahy-ley-bee-uh l]Phonetics
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adjective
  1. produced with the lips close together or touching: the lips touch at one phase of the production of the bilabial consonants p, b, and m; they do not for the bilabial w.
noun
  1. a bilabial speech sound.

Origin of bilabial

First recorded in 1860–65; bi-1 + labial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for bilabial

bilabial

adjective
  1. of, relating to, or denoting a speech sound articulated using both lips( p ) is a bilabial stop, ( w ) a bilabial semivowel
noun
  1. a bilabial speech sound
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

Word Origin and History for bilabial

adj.

1857, from bi- + labial. Alternative bilabiate is attested from 1794.

Online Etymology Dictionary, © 2010 Douglas Harper