Douglas Harper's Etymology Dictionary
metastasise
chiefly British English spelling of metastasize.\nRelated: Metastasised; metastasising.
Wiktionary
metastasise
vb. (alternative spelling of metastasize English)
WordNet
metastasise
v. spread throughout the body; "the cancer had metastasized and the patient could not be saved" [syn: metastasize]
Usage examples of "metastasise".
What they actually wanted, though, was a large sample of metastasising cells so they could perfect the biggest selling point of the HealthGuard: cancer protection.