noun Cell Biology.
the doubling of the chromosome number by the union of the haploid sets in the union of gametes.

< Greek díplōsis a doubling, equivalent to diplō- (see diploma) + -sis -sis

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World English Dictionary
diplosis (dɪˈpləʊsɪs)
biology the doubling of the haploid number of chromosomes that occurs during fusion of gametes to form a diploid zygote
[C20: from Greek diplōsis doubling, from diploun to double, from diploos double]

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Medical Dictionary

diplosis dip·lo·sis (dĭ-plō'sĭs)
The formation of the diploid number of chromosomes during fertilization by the fusion of the nuclei of two haploid gametes.

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