Lune /(lūn)/

Lune

n.
  1. Anything in the shape of a half moon. [R.]
  2. A figure in the form of a crescent, bounded by two intersecting arcs of circles. (Geom.)
  3. A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak. [Obs.]
    These dangerous, unsafe lunes i' the king.