Tumor

[американский вариант английского языка]; смотри значение tumour

Большой англо-русский словарь

Tumor

noun Etymology: Middle English tumour, from Latin tumor, from tumēre 1. a swollen or distended part 2. an abnormal benign or malignant new growth of tissue that possesses no physiological function and arises from uncontrolled usually rapid cellular proliferation — called also neoplasmtumoral adjectivetumorlike adjective

Энциклопедический словарь Мерриама-Вебстера