Definitions for "Double fertilization"
Process virtually unique to angiosperms in which one sperm nucleus combines with the egg to produce a zygote, and the other sperm nucleus combines with the two polar nuclei to produce the first cell of the triploid endosperm.
The fertilization process in angiosperms resulting in fusion of pollen nuclei with both zygote and the polar bodies to form the 2N embryo and the 3N endosperm.
fertilization system unique to flowering plants in which two sperm nuclei enter the egg sac (megagametophyte). One fuses with the egg nucleus to form a zygote and the other fuses with two polar nuclei to form a triploid cell that will develop into the endosperm.