Dictionary Home »
Dictionary Definitions » pronucleus
pronucleus
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
Related Forms:
- pronuclear adjective
See pronucleus in American Heritage Dictionary 4
Learn more about pronucleus