karyosome

noun
kar·yo·some | \ˈker-ē-ə-ˌsōm, ˈka-rē-\

Definition of karyosome 

: a mass of chromatin in a cell nucleus that resembles a nucleolus

First Known Use of karyosome

1889, in the meaning defined above

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The first known use of karyosome was in 1889

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karyosome

noun
kar·yo·some | \ˈkar-ē-ə-ˌsōm \

Medical Definition of karyosome 

: a mass of chromatin in a cell nucleus that resembles a nucleolus

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