Definition of lunule in English:

lunule

Syllabification: lu·nule
Pronunciation: /ˈlo͞onˌyo͞ol
 
/

noun

  • 1A crescent-shaped or oval part or marking, in particular.
  • 1.1An oval depression in front of the beak on the outside of many clams.
    More example sentences
    • Therefore, the possession of the anterior, unpaired lunule in ambulacrum III, is a plesiomorphic character for the Mellitidae in general.
    • This type of lunule is completely unknown in any other echinoid.
    • Other measurements of test length, lunule lengths, widths, positions, apex position, and petaloid lengths were made from both the fossil and extant Leodia material using dial calipers.
  • 1.2A small area above the antennae on the front of some kinds of flies.
    More example sentences
    • A small median plate lying between the ptilinal fissure and the bases of the antennae is named the lunule.
    • The frontal lunule is a small crescent shaped piece immediately above the antennae, which is characteristic of the second suborder, the Cyclor rhapha.

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