Source : Webster's Revised Unabridged Dictionary (1913)

Intercross \In`ter*cross"\ (?; 115), v. t. & i. [imp. & p. p.
   {Intercrossed}; p. pr. & vb. n. {Intercrossing}.]
   1. To cross each other, as lines.

   2. (Biol.) To fertilize by the impregnation of one species or
      variety by another; to impregnate by a different species
      or variety.

Intercross \In"ter*cross`\, n.
   The process or result of cross fertilization between
   different kinds of animals, or different varieties of plants.

         We have reason to believe that occasional intercrosses
         take place with all animals and plants.  --Darwin.