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Definitions of nucleus
  1. noun
    a part of the cell containing DNA and RNA and responsible for growth and reproduction

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  2. noun
    a small group of indispensable persons or things

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    type of:
    set
  3. noun
    the central structure of the lens that is surrounded by the cortex

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  4. noun
    any histologically identifiable mass of neural cell bodies in the brain or spinal cord
    type of:
  5. noun
    (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
    part of:
  6. noun
    the positively charged dense center of an atom
    part of:
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