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Definition of Pronucleus
1. Noun. The nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote.
Definition of Pronucleus
1. n. One of the two bodies or nuclei (called male and female pronuclei) which unite to form the first segmentation nucleus of an impregnated ovum.
Definition of Pronucleus
1. [n -CLEI or -CLEUSES]