• WordNet 3.6
    • adj labial relating to or near the female labium
    • adj labial of or relating to the lips of the mouth "labial stops"
    • n labial a consonant whose articulation involves movement of the lips
    • ***
Webster's Revised Unabridged Dictionary
    • Labial (Phonetics) A letter or character representing an articulation or sound formed or uttered chiefly with the lips, as b p w.
    • Labial (Mus) An organ pipe that is furnished with lips; a flue pipe.
    • Labial (Phonetics) Articulated, as a consonant, mainly by the lips, as b, p, m, w.
    • Labial (Mus) Furnished with lips; as, a labial organ pipe.
    • Labial (Phonetics) Modified, as a vowel, by contraction of the lip opening, as ō (ōld), etc., and as eu and u in French, and öü in German. See Guide to Pronunciation, §§ 11, 178.
    • Labial (Zoöl) Of or pertaining to the labium; as, the labial palpi of insects. See Labium.
    • Labial Of or pertaining to the lips or labia; as, labial veins.
    • Labial (Zoöl) One of the scales which border the mouth of a fish or reptile.
    • ***
Century Dictionary and Cyclopedia
    • labial In anatomy and zoology, pertaining to the lips or to a lip-like part; situated on or by a lip; having a lip-like character, as in shape, position, or office: as, a labial vessel or nerve; a labial fold or process.
    • labial In entomology, pertaining to the labium, or lower lip of an insect.
    • labial Formed by the lips, as a sound. See II., 1.
    • labial Giving forth tones produced by the impact of a stream of air upon a sharp edge or lip: applied to musical instruments such as the flute or the flue-pipes of an organ.
    • n labial A letter or character representing an articulate sound which in speaking is accompanied by a proximate or complete closure of the lips. The labials in English are the mutes p, b, the nasal m, and the fricative f, v (usually made between lips and teeth, and hence called more exactly labiodentals); and the semivowel w and vowels oo and o, as involving a rounding of the lips, are often ranked in the same class.
    • n labial In herpetology, one of a series of plates or scales which lie along the edge of the lips, especially in Ophidia, those of the upper lip being the superior labials, those of the lower lip the inferior labials.
    • n labial In entomology, one of the labial palpi.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Labial lā′bi-al pertaining to the lips: formed by the lips
    • n Labial a sound formed by the lips: a letter representing a sound formed either by both the lips, or by the upper lip and under teeth—p, b, m, f, v
    • ***


Webster's Revised Unabridged Dictionary
LL. labialis, fr. L. labium, lip: cf. F. labial,. See Lip


In literature:

The labial appendages of the Hottentot female have been celebrated for many years.
"Anomalies and Curiosities of Medicine" by George M. Gould
In the language of Malicolo a great number of harsh labial sounds prevail, very difficult to be represented in writing.
"A General History and Collection of Voyages and Travels, Vol. 15 (of 18)" by Robert Kerr
"New Latin Grammar" by Charles E. Bennett
But there was an "o" in it and a labial hint of an extra "u.
"From Place to Place" by Irvin S. Cobb
Diploglossata: an ordinal term proposed for Hemimeridae, because of the supposed presence of a second labial segment.
"Explanation of Terms Used in Entomology" by John. B. Smith
Labial palpi rather bulky, short and with three joints, like the antennae.
"The Glow-Worm and Other Beetles" by Jean Henri Fabre
Variation in Contact of the Prefrontals and the Labials in 243 Specimens of Tantilla gracilis.
"Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard" by Laurence M. Hardy
As with the other moths of the family, its labial palpi are very long.
"Butterflies and Moths" by William S. Furneaux
Maxillary and labial palpi are also present, and the latter, together with the labrum or lower lip, form the rostrum.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4" by Various
Even his fifty-two dialects will not satisfy him after your labial.
"The Story of an Untold Love" by Paul Leicester Ford

In poetry:

The labial sacrifice, O Lord! receive,
Which now, to thee, we for thy mercies give;
Because so fully, whenso-e'er they need,
Thou, with thy creatures, dost thy servants feed!
"Another Grace, After Meat" by Rees Prichard

In news:

This labial saturation in modern comedy is probably the cause of James Wolcott's Vanity Fair essay on how men in cinema can no longer have strong phalli…just limp dicks.
Estos nuevos brillos labiales/linternas son lo último en el mundo de la belleza.
Lo último en brillo labial .
CASE REPORT Eruption of a Labially Impacted Canine Using a Closed-Flap Technique and Orthodontic Wire Traction.
New developments in facial implants have made it easier than ever to augment the nasal labial fold, also known as the buccolabial (byou-koh-LAY-bee-uhl) fold, which is the groove that runs from your nose to the corner of your mouth.
People with less prominent cheekbones tend to have deeper nasal labial folds.
If a labial frenulum, tissue that attaches the middle of the upper lip to the gum, passes between the incisors, it can keep them from closing.
Seen any labial furrows lately.
Now, Day says, to make nasal-labial folds retreat in the most natural-looking way, she prefers to add a tiny bit of volume to the cheeks (using Radiesse, Perlane, or Juvéderm Ultra Plus) instead of the wrinkles .

In science:

One such example is #20: labial-velars implies no uvulars.4 It turns out that labial-velars are most common in Africa just north of the equator, which is also a place that has very few uvulars (there are a handful of other examples, mostly in Papua New Guinea).
A Bayesian Model for Discovering Typological Implications
Labial-velars and uvulars are rare consonants (order 100 languages).
A Bayesian Model for Discovering Typological Implications
Labial-velars are joined sounds like /kp/ and /gb/ (to English speakers, sounding like chicken noises); uvulars sounds are made in the back of the throat, like snoring.
A Bayesian Model for Discovering Typological Implications