tumor

noun

USTOO-mur/tuː.məɹ/TYOO-muh/tjuː.mə/

Pluraltumors

UK spellingtumour

1 meaning of tumor

1
nouncountable
An unusual lump of body tissue that grows where it should not.
Like a lump of cells piling up where they don't belong.
The doctor found a small tumor on the scan and ordered more tests.
Surgeons removed the tumor before it could grow any larger.
Similargrowth, neoplasm, mass, lump
Note

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Origin

From Latin tumor meaning "swelling," from a verb tumeō meaning "to bulge or swell." It came into English through Old French.