The word lunula means moon-like and commonly refers to:

• Lunula (anatomy) ("fingernail moons")
• The openings in the test of sand dollars
• Two round brackets and the text between them
• A type of necklace shaped like a crescent moon
  • Gold lunula refers to a specific kind of archaeological necklace
• Calophasia lunula, a species of moth (image)
• Chaetodon lunula, a species of butterflyfish (image)

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