labium

 
Pronunciation: /ˈleɪbɪəm/

noun (plural labia /-bɪə/)

  • 1 Entomology a fused mouthpart which forms the floor of the mouth of an insect.
  • 2 Botany the lower lip of the flower of a plant of the mint family.

Origin:

late 16th century (in the general sense 'lip, lip-like structure'): from Latin, 'lip'; related to labrum