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nucleation
nuclei
nucleic acid
nuclein
nucleo-
nucleocapsid
nucleoid
nucleolar
nucleolar organizer
nucleolus
nucleon
nucleon number
nucleonics
nucleophile
nucleoplasm
nucleoprotein
nucleoside
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nucleolar organizer
nu·cle·o·lar or·gan·iz·er (plural nu·cle·o·lar or·gan·iz·ers)


noun 
Definition:
 
part of chromosome: a segment of a chromosome at which a nucleolus forms
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