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English definition of “tumour”

tumour

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