Definition of "fertilized egg" [fertilized egg]

• An animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life (noun)

WordNet. Princeton University. 2010.

• "The fertilized egg is then replaced in her fallopian tube at the time of her next ovulatory cycle, where it grows, and the child is born—free of any predisposition toward alcoholism."
• "Nevertheless, you could in theory make a similar family tree for every one of your trillion-odd cells as opposed to the 558 cells of a C. elegans female larva, tracing each one’s descent back to the one fertilized egg cell."