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pronucleus
(redirected from pronuclei)

    Also found in: Medical, Encyclopedia, Wikipedia 0.06 sec.
pro·nu·cle·us  (pr-nkl-s, -ny-)
n. pl. pro·nu·cle·i (-kl-)
The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.
pro·nucle·ar adj.
pronucleus [ˌprəʊˈnjuːklɪəs]
n pl -clei [-klɪˌaɪ]
(Life Sciences & Allied Applications / Biology) the nucleus of a mature ovum or spermatozoan before fertilization
ThesaurusLegend:  Synonyms Related Words Antonyms
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


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