For Labium we have terms and definitions in 3 topics. The topics are Entomological, Insect and Spiders.

The 'lower lip' of the insect mouth-parts, formed by the fusion of two maxilla-like appendages.
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The 'lower lip' of the insect mouth-parts, formed by the fusion of two maxilla-like appendages.
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The lip, under the mouth opening and between the maxillae, attached to the front of the sternum.
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