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Definition of: pronucleus

(prō·noomacr′klē·əs, -nyoomacr′-) noun plural ·cle·i (-klē·ī) Biol.
The nucleus of either the spermatozoon or ovum, the union of which forms the nucleus of the fertilized ovum. [<NL <Gk. pro- before + L nucleus a kernel]

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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