Source : Webster's Revised Unabridged Dictionary (1913)

Acinaciform \Ac`i*nac"i*form\ ([a^]s`[i^]*n[a^]s"[i^]*f[^o]rm),
   a. [L. acinaces a short sword + -form: cf. F. acinaciforme.]
   (Bot.)
   Scimeter-shaped; as, an acinaciform leaf.