limb2

 
Pronunciation: /lɪm/

noun

  • 1 Astronomy the edge of the disc of a celestial object, especially the sun or moon: the eastern limb of the moon
  • 2 Botany the blade or broad part of a leaf or petal.
  • the spreading upper part of a tube-shaped flower.
  • 3the graduated arc of a quadrant or other scientific instrument, used for measuring angles.

Origin:

late Middle English: from French limbe or Latin limbus 'hem, border'