Lune or Loon ?
Your choice!
Lune
Exemple : ‘’I drew a lune shape on the corner of the piece of paper.’’
The words "lune" and "loon" are homonyms and consequently are frequently mixed up. "Lune" is the noun used to denote a crescent type shape.
Loon
Exemple : ‘’He is a complete loon!’’
"Loon" is an informal word used to denote someone who is crazy.