The Collaborative International Dictionary
Cancerate
Cancerate \Can"cer*ate\, v. i. [imp. & p. p. Cancerated.] [LL.
canceratus eaten by a cancer. See Cancer.]
To grow into a cancer; to become cancerous.
--Boyle.
Wiktionary
cancerate
vb. (context obsolete intransitive English) To grow into a cancer; to become cancerous.