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pro·nu·cle·us | \ (ˌ)prō-ˈnü-klē-əs 
, -ˈnyü- \
, -ˈnyü- \Definition of pronucleus
: the haploid nucleus of a male or female gamete (such as an egg or sperm) up to the time of fusion with that of another gamete in fertilization
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More Definitions for pronucleus
pronucleus
nounpro·nu·cle·us | \ (ˈ)prō-ˈn(y)ü-klē-əs \
\ plural pronuclei\ -klē-ˌī \ also pronucleuses
\ also pronucleusesMedical Definition of pronucleus
: the haploid nucleus of a male or female gamete (as an egg or sperm) up to the time of fusion with that of another gamete in fertilization — see female pronucleus, male pronucleus
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The first known use of pronucleus was in 1876
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