Source : Webster's Revised Unabridged Dictionary (1913)

Saker \Sa"ker\ (s[=a]"k[~e]r), n. [F. sacre (cf. It. sagro, Sp.
   & Pg. sacre), either fr. L. sacer sacred, holy, as a
   translation of Gr. "ie`rax falcon, from "iero`s holy, or more
   probably from Ar. [,c]aqr hawk.] [Written also {sacar},
   {sacre}.]
   1. (Zo["o]l.)
      (a) A falcon ({Falco sacer}) native of Southern Europe and
          Asia, closely resembling the lanner.

   Note: The female is called {chargh}, and the male
         {charghela}, or {sakeret}.
      (b) The peregrine falcon. [Prov. Eng.]

   2. (Mil.) A small piece of artillery. --Wilhelm.

            On the bastions were planted culverins and sakers.
                                                  --Macaulay.

            The culverins and sakers showing their deadly
            muzzles over the rampart.             --Hawthorne.