lune

Etymology 1

From Latin lūna (“moon”).

noun

1. (obsolete) A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak.
   A mad world this, my friends, a world in its lunes, petty and other; in lunes other than petty now for some time; in petty-lunes, pettilettes, or pantalettes, about these six weeks, ever since when this rampant androgynous Bloomerism first came over from Yankee land. 1851 July–December, Thomas Snarlyle, “Bloomerism: A Latter-Day Fragment”, in Punch, volume XXI, page 217

Etymology 2

From French lune, from Latin luna.

noun

1. 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.
   What he worried about was any eventual convexity, a shrinking, it might be, of the planet itself to some palpable curvature of whatever he would be standing on, so that he would be left sticking out like a projected radius, unsheltered and reeling across the empty lunes of his tiny sphere. 1984, Thomas Pynchon, Slow Learner
2. Anything crescent-shaped.

Etymology 3

Alteration of lyon.

noun

1. (hawking) A leash for a hawk.