bilabial

bilabial
    adj 1: of or relating to or being a speech sound that is
           articulated using both lips; "bilabial fricatives"
    n 1: a consonant that is articulated using both lips; /p/ or /b/
         or /w/
    

bilabial \bi*la"bi*al\ adj. (Linguistics)
   produced using both lips; -- said of a consonant. As,
    

bilabial \bi*la"bi*al\ n. (Linguistics)
   a consonant that is articulated using both lips, as p or b or
   w.
   [WordNet 1.5]
    

125 Moby Thesaurus words for "bilabial":
      accented, allophone, alveolar, apical, apico-alveolar,
      apico-dental, articulated, articulation, aspiration, assimilated,
      assimilation, back, barytone, broad, cacuminal, central, cerebral,
      check, checked, close, consonant, consonantal, continuant, dental,
      diphthong, dissimilated, dissimilation, dorsal, epenthetic vowel,
      explosive, flat, front, glide, glossal, glottal, glottalization,
      guttural, hard, heavy, high, intonated, labial, labialization,
      labiodental, labiovelar, laryngeal, lateral, lax, light, lingual,
      liquid, low, manner of articulation, mid, modification,
      monophthong, monophthongal, morphophoneme, mute, muted, narrow,
      nasal, nasalized, occlusive, open, oxytone, palatal, palatalized,
      parasitic vowel, peak, pharyngeal, pharyngealization,
      pharyngealized, phone, phoneme, phonemic, phonetic, phonic, pitch,
      pitched, plosive, posttonic, prothetic vowel, retroflex, rounded,
      segmental phoneme, semivowel, soft, sonant, sonority, speech sound,
      stop, stopped, stressed, strong, surd, syllabic, syllabic nucleus,
      syllabic peak, syllable, tense, thick, throaty, tonal, tonic,
      transition sound, triphthong, twangy, unaccented, unrounded,
      unstressed, velar, vocable, vocalic, vocoid, voice, voiced,
      voiced sound, voiceless, voiceless sound, voicing, vowel,
      vowellike, weak, wide