(redirected from Male pronucleus)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Male pronucleus: Female pronucleus


 (prō-no͞o′klē-əs, -nyo͞o′-)
n. pl. pro·nu·cle·i (-klē-ī′)
The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.

pro·nu′cle·ar adj.


n, pl -clei (-klɪˌaɪ)
(Biology) the nucleus of a mature ovum or spermatozoan before fertilization
pronuclear adj


(proʊˈnu kli əs, -ˈnyu-)

n., pl. -cle•i (-kliˌaɪ)
the haploid nucleus of either the sperm or ovum that unites with the opposite-sex nucleus during fertilization.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pronucleus - the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote
cell nucleus, karyon, nucleus - a part of the cell containing DNA and RNA and responsible for growth and reproduction
References in periodicals archive ?
Without to ocytes activation, male pronucleus and female pronucleus unable to formed together into zygote.
Male pronucleus formation and early embryonic development after sperm penetration is inhibited if acolytes have no cumulus cells matured.
This study was aimed to evaluate the xenogenic dog sperm in formation of male pronucleus following injection into the sheep oocytes.
Of single stranded (S5) and ds DNA breaks, in the sperms the latter have greater mutagenic potential, because of the absence of an error free copy as a template for DNA repair in the G1 phase male pronucleus.