pronucleus
noun
pro·nu·cle·us
(ˌ)prō-ˈnü-klē-əs 
-ˈnyü-
: 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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Pronuclear transfer is the easier and cheaper method since the pronucleus is larger and easier to image and transfer than the spindle.
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Radhika Viswanathan, Vox, 24 July 2018
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Radhika Viswanathan, Vox, 24 July 2018
Cite this Entry
“Pronucleus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pronucleus. Accessed 8 Jul. 2025.
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pronucleus
noun
pro·nu·cle·us
(ˈ)prō-ˈn(y)ü-klē-əs
plural pronuclei
-klē-ˌī
also pronucleuses
also pronucleuses
: 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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