cross-fertilisation

from WordNet (r) 3.0 (2006)

cross-fertilisation
    n 1: fertilization by the union of male and female gametes from
         different individual of the same species [syn: {cross-
         fertilization}, {cross-fertilisation}] [ant: {self-
         fertilisation}, {self-fertilization}]
    2: interchange between different cultures or different ways of
       thinking that is mutually productive and beneficial; "the
       cross-fertilization of science and the creative arts" [syn:
       {cross-fertilization}, {cross-fertilisation}]

from The Collaborative International Dictionary of English v.0.48

cross-fertilisation \cross-fertilisation\, cross-fertilization
\cross-fertilization\n.
   1. fertilization by the union of male and female gametes from
      different individuals of the same species.
      [WordNet 1.5]