1. (a.) Of or pertaining to the lips or labia; as, labial veins.

2. (a.) Furnished with lips; as, a labial organ pipe.

3. (a.) Articulated, as a consonant, mainly by the lips, as b, p, m, w.

4. (a.) Modified, as a vowel, by contraction of the lip opening, as / (f/d), / (/ld), etc., and as eu and u in French, and o, u in German. See Guide to Pronunciation, // 11, 178.

5. (a.) of or pertaining to the labium; as, the labial palpi of insects. See Labium.

6. (n.) A letter or character representing an articulation or sound formed or uttered chiefly with the lips, as b, p, w.

7. (n.) An organ pipe that is furnished with lips; a flue pipe.

8. (n.) One of the scales which border the mouth of a fish or reptile.

accented allophone alveolar apical apico-alveolar apico-dental articulated articulation aspiration assimilated assimilation back barytone bilabial 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 labialization labiate labiodental labiovelar laryngeal lateral lax light lingual lipped 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