[proh-noo-klee-uh s, -nyoo-]
Origin of pronucleus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the nucleus of a mature ovum or spermatozoan before fertilization
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- One of two nuclei undergoing fusion in karyogamy.
- The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.