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单词 nucleolus
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WordReference Random House Unabridged Dictionary of American English © 2024
nu•cle•o•lus  (no̅o̅ klēə ləs, nyo̅o̅-),USA pronunciation n., pl. -li (-lī′).USA pronunciation [Cell Biol.]
  1. Cell Biologya conspicuous, rounded body within the nucleus of a cell. See diag. under cell. 
  • Late Latin: small kernel, equivalent. to nucle(us) kernel (see nucleus) + -olus -ole1
  • 1835–45

Collins Concise English Dictionary © HarperCollins Publishers::
nucleolus /ˌnjuːklɪˈəʊləs/ n ( pl -li / -laɪ/)
  1. a small rounded body within a resting nucleus that contains RNA and proteins and is involved in the production of ribosomes
    Also called: nucleole
Etymology: 19th Century: from Latin, diminutive of nucleus

ˌnucleˈolar, ˈnucleoˌlate, ˈnucleoˌlated adj
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