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1. Of or relating to the lips or labia.
2. Linguistics Articulated mainly by closing or partly closing the lips, as the sounds (b), (m), or (w).
1. Linguistics A labial consonant.
2. Music See flue1.

[Medieval Latin labiālis, from Latin labium, lip; see leb- in Indo-European roots.]

la′bi·al·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
The protoconid and hypoconid are visible labially while the metaconid is prominent lingually.
The dynamometer deflects the teeth palatally or labially with a known force and this deflection is measured in hundredths of millimetres.
The transverse valleys are open labially but some of them are closed lingually.
At the end of the study period, the mandibular incisors moved labially at a mean value of 0.66+-0.902mm.
As shown in Figure, anterior dentition of the three groups presented obvious expansion of dental arch in canine area because the crown and root of canine were both moved labially. Moreover, the amount of displacement on the cuspid of canine in the group B was approximately twice than that in the groups A and C.
The exact etiology is unknown, but a review of literature suggests that abnormally labially positioned tooth, very thin labial plates, high frenal pull, and sometimes long-standing trauma may cause the dehiscence and fenestration defects.
The coronal portion of the tooth was bent labially at the cervical region and was placed almost at right angle to the long axis of the root.
Teeth with multicuspid cladodont crown; central cusp twice as high and three times more broad than the lateral and intermediate cusps; pair of high accessory cusplets placed outside the lateral cusps; two rows of numerous high and small accessory cusplets placed labially; intermediate cusps and cusplets differently directed and incurved; labial cristae on the central cusp extended and prominent at the base; sub-lenticular base very elongated mesio-distally; ridge-like apical button considerably elongated, placed close to the lingual rim; shelf-like wide labio-basal projection; dense network of vascular canals occupying the entire tooth base.
Local anesthesia (two 1.8 mL carpules of 2% lidocaine with 1: 100,000 epinephrine) was then administered labially and palatally.
The most frequently transposed tooth is the maxillary canine, which may be impacted palatally or labially while being displaced in the palatolabial plane.
Murids relative position: 0 = not aligned, anterior murid displaced labially; 1 = aligned, anterior murid in front of median murid.
The caliper beaks were inserted labially parallel to the occlusal surface, then the distance between the contact points between the proximal surfaces was measured.11 The inclusion criteria were defined as: