pronucleus

noun
pro·​nu·​cle·​us | \(ˌ)prō-ˈnü-klē-əs, -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

First Known Use of pronucleus

1876, in the meaning defined above

History and Etymology for pronucleus

New Latin

Keep scrolling for more

Learn More about pronucleus

Share pronucleus

Statistics for pronucleus

Look-up Popularity

Time Traveler for pronucleus

The first known use of pronucleus was in 1876

See more words from the same year

Keep scrolling for more

More Definitions for pronucleus

pronucleus

noun
pro·​nu·​cle·​us | \(ˈ)prō-ˈn(y)ü-klē-əs \
plural -clei\ -​klē-​ˌī \ 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

Comments on pronucleus

What made you want to look up pronucleus? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

obstinately defiant of authority

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!