pronucleus[prō no̵̅o̅′klē əs, -nyo̵̅o̅′-]
pronucleus definition by Webster's New World
noun pl. pronuclei
Zool. the haploid nucleus of either the spermatozoon or the ovum which unite in fertilization to form the fused double (or diploid) nucleus of the fertilized ovum, or zygote
Origin: ModL: see pro- and amp; nucleus
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- pronuclear adjective
pronucleus definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun pl. pro·nu·cle·i
The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.
- pro·nuˈcle·ar adjective
pronucleus - Medical Definition
- One of two nuclei undergoing fusion in karyogamy.
- The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.