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organ

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noun [countable] organ pronunciation in British English /ˈɔː(r)ɡən/ 
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singularorgan
pluralorgans
  1. 1
    biology a part of your body that does a specific job, such as your heart or brain. Your vital organs are the organs that you cannot live without

    digestive/sexual/sense organs

    organ transplant operations

    The Health Service has a register of potential organ donors.

    an organ donor card

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