fertilization

fertilization
(亦作 -isation)
noun
[mass noun](Biology)
  1. the action or process of fertilizing an egg or a female animal or plant, involving the fusion of male and female gametes to form a zygote
    (生)授精
    ■the action or process of applying a fertilizer to soil or land
    (土壤或土地的)施肥
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