noun, plural labia [ley-bee-uh] .
a lip or liplike part.
a lip or lip-shaped structure or part.
any of the folds of skin bordering the vulva.
Botany. the lower lip of a bilabiate corolla.
Entomology. the posterior, unpaired member of the mouthparts of an insect, formed by the united second maxillae.

1590–1600; < Latin: lip, akin to lambere to lick, lap3. See labrum1, lip

pseudolabium, noun, plural pseudolabia. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
labium (ˈleɪbɪəm)
n , pl -bia
1.  a lip or liplike structure
2.  labia majora See labia minora any one of the four lip-shaped folds of the female vulva
3.  the fused pair of appendages forming the lower lip of insects
4.  the lower lip of the corolla of labiate flowers
[C16: New Latin, from Latin: lip]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

labium la·bi·um (lā'bē-əm)
n. pl la·bi·a (-bē-ə)

  1. A lip or lip-shaped anatomical structure.

  2. Any of four folds of tissue of the female external genitalia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
labium   (lā'bē-əm)  Pronunciation Key 
Plural labia
Either of two pairs of folds of tissue that make up part of the external genitalia of female mammals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The mouth parts consist of a labrum, labium, and the paired mandibles and maxillae.
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