pronucleus Hear it!

pronucleus definition

pro·nu·cleus (prō no̵̅o̅′klē əs, -nyo̵̅o̅′-)

noun pl. pronuclei -·clei′ (-nyo̵̅o̅′-)

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

Etymology: ModL: see pro- & nucleus

Related Forms:

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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