pronucleus

noun

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

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, 24 July 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'pronucleus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

New Latin

First Known Use

1876, in the meaning defined above

Time Traveler
The first known use of pronucleus was in 1876

Dictionary Entries Near pronucleus

Cite this Entry

“Pronucleus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pronucleus. Accessed 25 May. 2024.

Medical Definition

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
: 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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