Definition of metastasis noun from the Oxford Advanced Learner's Dictionary

 

metastasis

 noun
noun
BrE BrE//məˈtæstəsɪs//
 
; NAmE NAmE//məˈtæstəsɪs//
 
[uncountable](medical)
 
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the development of tumours in different parts of the body resulting from cancer that has started in another part of the body Word Origin late 16th cent. (as a rhetorical term, meaning ‘rapid transition from one point to another’): from Greek, literally ‘removal or change’, from methistanai ‘to change’.
See the Oxford Advanced American Dictionary entry: metastasis