Source : Webster's Revised Unabridged Dictionary (1913)

Crucifix \Cru"ci*fix\ (kr?"s?-f?ks), n.; pl. {Crucifixes} (-?z).
   [F. crucifix or LL. crucifixum, fr. L. crux, crucis, cross +
   figere, fixum, to fix. See {Cross}, and {Fix}, and cf.
   Crucify.]
   1. A representation in art of the figure of Christ upon the
      cross; esp., the sculptured figure affixed to a real cross
      of wood, ivory, metal, or the like, used by the Roman
      Catholics in their devotions.

            The cross, too, by degrees, become the crucifix.
                                                  --Milman.

            And kissing oft her crucifix, Unto the block she
            drew.                                 --Warner.

   2. The cross or religion of Christ. [R.] --Jer. Taylor.

Source : WordNet®

crucifix
     n 1: representation of the cross on which Jesus died [syn: {rood},
           {rood-tree}]
     2: a gymnastic exercise performed on the rings when the gymnast
        supports himself with both arms extended horizontally