the doubling of the haploid number of chromosomes that occurs during fusion of gametes to form a diploid zygote
Word origin
C20: from Greek diplōsis doubling, from diploun to double, from diploos double
diplosis in American English
(dɪˈploʊsɪs; daɪˈploʊsɪs)
noun
doubling of the number of chromosomes through the fusion of two haploid sets in the union of gametes, resulting in the formation of the somatic chromosome number