1) Conjugation 2) Coupling 3) Cross 4) Crossbreeding 5) Crossing 6) Hybridization 7) Hybridizing 8) Interbreeding 9) Mating 10) Pairing 11) Sexual union 12) Union 1) Crossbreeding 2) Hybridization 3) Hybridizing 4) Interbreeding 5) Testcross 
ways in which forms of social life become diversified as they separate from old practices and recombine into new ones: a 'global mélange'
The act of crossing flowers to produce hybrids.
See hybrid zone and hybrid. If new species are formed by hybridisation the hybrids must have higher fitness than the parental forms, they can achieve this by occupying new niches.
Crossing of individuals from genetically different strains, populations, or species. 
<molecular biology> The process of joining two complementary strands of DNA or one each of DNA and RNA to form a double-stranded molecule. ... Technique in which single stranded nucleic acids are allowed to interact so that complexes or hybrids, are formed by molecules with sufficiently similar, complementary sequences. By this means the degr...
The process by which organisms of unlike hereditary constitution are crossed to produce F1 progeny with genes for the characteristics of both parents i.e. cross breeding.