Source : Webster's Revised Unabridged Dictionary (1913)

Falchion \Fal"chion\, n. [OE. fauchon, OF. fauchon, LL.
   f["a]lcio, fr. L. falx, falcis, a sickle, cf. Gr. ?????? a
   ship's rib, ?????? bandy-legged; perh, akin to E. falcon; cf.
   It. falcione. Cf. {Defalcation}.]
   1. A broad-bladed sword, slightly curved, shorter and lighter
      than the ordinary sword; -- used in the Middle Ages.

   2. A name given generally and poetically to a sword,
      especially to the swords of Oriental and fabled warriors.

Source : WordNet®

falchion
     n : a short broad slightly convex medieval sword with a sharp
         point