pronucleus

noun
pro·​nu·​cle·​us | \ (ˌ)prō-ˈnü-klē-əs How to pronounce pronucleus (audio) , -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

Examples of pronucleus in a Sentence

Recent Examples on the Web Pronuclear transfer is the easier and cheaper method since the pronucleus is larger and easier to image and transfer than the spindle. Radhika Viswanathan, Vox, "3 biological parents, 1 child, and an international controversy," 24 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pronucleus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pronucleus

1876, in the meaning defined above

History and Etymology for pronucleus

New Latin

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The first known use of pronucleus was in 1876

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Cite this Entry

“Pronucleus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pronucleus. Accessed 6 May. 2021.

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More Definitions for pronucleus

pronucleus

noun
pro·​nu·​cle·​us | \ (ˈ)prō-ˈn(y)ü-klē-əs How to pronounce pronucleus (audio) \
plural pronuclei\ -​klē-​ˌī How to pronounce pronucleus (audio) \ also pronucleuses

Medical 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

More from Merriam-Webster on pronucleus

Britannica.com: Encyclopedia article about pronucleus

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