nucleolus organizer

noun

Definition of nucleolus organizer 

: the specific part of a chromosome with which a nucleolus is associated especially during its reorganization after nuclear division

called also nucleolar organizer

First Known Use of nucleolus organizer

1939, in the meaning defined above

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The first known use of nucleolus organizer was in 1939

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nucleolus organizer

noun

Medical Definition of nucleolus organizer 

: the specific part of a chromosome with which a nucleolus is associated especially during its reorganization after nuclear division

called also nucleolar organizer

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