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Meaning of pronucleus

pro•nu•cle•us

Pronunciation: (prō-n'klē-us, -ny'-), [key]
— pl. -cle•i
  1. either of the gametic nuclei that unite in fertilization to form the nucleus of the zygote.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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