As a noun tumour is
(oncology|pathology) an abnormal growth; differential diagnosis includes abscess, metaplasia, and neoplasia.
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English
Noun
(
en noun)
(oncology, pathology) An abnormal growth; differential diagnosis includes abscess, metaplasia, and neoplasia.
Usage notes
*
* is the standard modern British and Commonwealth spelling (including Canada), and tumor is the standard American spelling.
Derived terms
* tumourigenesis