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

Origin and Etymology of pronucleus

New Latin


Medical Dictionary

pronucleus

noun pro·nu·cle·us \ (ˈ)prō-ˈn(y)ü-klē-əs \

medical Definition of pronucleus

plural -clei play \-klē-ˌī\ 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

Learn More about pronucleus


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

money or riches

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

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!