The Collaborative International Dictionary of English v.0.48:

Scimiter \Scim"i*ter\, Scimitar \Scim"i*tar\, n. [F. cimeterre,
   cf. It. scimitarra, Sp. cimitarra; fr. Biscayan cimetarra
   with a sharp edge; or corrupted from Per. shimsh[imac]r.]
   1. A saber with a much curved blade having the edge on the
      convex side, -- in use among Mohammedans, esp., the Arabs
      and persians. [Written also cimeter, and scymetar.]
      [1913 Webster]

   2. A long-handled billhook. See Billhook.
      [1913 Webster]

   Scimiter pods (Bot.), the immense curved woody pods of a
      leguminous woody climbing plant (Entada scandens)
      growing in tropical India and America. They contain hard
      round flattish seeds two inches in diameter, which are
      made into boxes.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Billhook \Bill"hook`\, n. [Bill + hook.]
   A thick, heavy knife with a hooked point, used in pruning
   hedges, etc. When it has a short handle, it is sometimes
   called a hand bill; when the handle is long, a hedge bill
   or scimiter.
   [1913 Webster]