Definition of labrum in English:

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labrum

Pronunciation: /ˈlābrəm/ /ˈlabrəm/

noun (plural labra /lābrə/ /ˈlabrə/)

Zoology
A structure corresponding to a lip, especially the upper border of the mouthparts of a crustacean or insect.

Derivatives

labral

Pronunciation: /ˈlābrəl/
adjective

Origin

Early 18th century: from Latin, literally 'lip'; related to labium.

For editors and proofreaders

Syllabification: la·brum

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