half-moon
1. [ noun ] (anatomy) the crescent-shaped area at the base of the human fingernail
Synonyms: lunule lunula
Related terms: area nail
2. [ noun ] (astronomy) the time at which the moon is at first or last quarter when half its face is illuminated
Related terms: phase_of_the_moon last_quarter first_quarter month
Similar spelling:   half-bound
  half-pint
  half-mast