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tumor

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tumor(US)noun
or Britishtumour/ˈtuːmɚ/British/ˈtjuːmə/
pluraltumors
tumor(US)
noun
or British tumour /ˈtuːmɚ/British/ˈtjuːmə/
pluraltumors
Learner's definition of TUMOR  
[count]
: a mass of tissue found in or on the body that is made up of abnormal cells
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