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pronominal
pronominalize
pronoun
pronounce
pronounced
pronto
Prontosil
pronuclear
pronucleus
pronunc.
pronunciamento
pronunciation
proof
proof of purchase
proof sheet
proof spirit
proof theory
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pronucleus
pro·nu·cle·us [ prō nklee əss ] (plural pro·nu·cle·i [ prō nklee  ] or pro·nu·cle·us·es)


noun 
Definition:
 
nucleus of ovum or spermatozoan: the nucleus of a fully matured ovum or spermatozoan before the nuclei are fused during fertilization
Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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