tu‧mour British English,
tumor American English /ˈtjuːmə $ ˈtuːmər/
noun [countable][
Date: 1400-1500;
Language: Latin;
Origin: tumere 'to swell']
a mass of diseased cells in your body that have divided and increased too quickly:
a brain tumourmalignant/benign tumour (=caused by or not caused by cancer) [TahlilGaran] Dictionary of Contemporary English ▲