cross-fertilization

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cross-fertilization:

see fertilizationfertilization,
in biology, process in the reproduction of both plants and animals, involving the union of two unlike sex cells (gametes), the sperm and the ovum, followed by the joining of their nuclei.
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cross-fertilization

[′krȯs ‚fərd·əl·ə′zā·shən]
(botany)
Fertilization between two separate plants.
(zoology)
Fertilization between different kinds of individuals.