Definitions for "Pronucleus"
One of the two bodies or nuclei (called male and female pronuclei) which unite to form the first segmentation nucleus of an impregnated ovum.
A specialized stage of the oocyte or sperm nucleus before their union. After this union the conceptus is referred to as a zygote.
An enlarged ovum or spermatozoon nucleus that forms after fertilization but before amphimixis.