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1. the compound nucleus in the fertilized oocyte, formed by conjugation of the nuclei of the oocyte and sperm (female and male pronuclei);
2. the zygote nucleus after it commences the first cleavage division.
Farlex Partner Medical Dictionary © Farlex 2012
The cell nucleus of a zygote formed by fusion of the male and female pronuclei.
See also: nucleus
Medical Dictionary, © 2009 Farlex and Partners