noun: (obsolete) A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak.
noun: A concave figure formed by the intersection of the arcs of two circles on a plane, or on a sphere the intersection between two great semicircles.
noun: Anything crescent-shaped.
noun: (hawking) A leash for a hawk.
noun: A river in Lancashire, England, which passes Lancaster.
