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tumour

noun [C] UK (US tumor)
 
 
/ˈtjuː.mər/ US  /ˈtuː.mɚ/

Definition

a mass of diseased cells that might become a lump or cause illness: They found a malignant tumour in her breast. a benign tumour a brain tumourCancerSwellings and lumps
(Definition of tumour noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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