To eat (parts of) another of one's own species. (verb)
To remove parts of (a machine, etc) for use in other similar machines. (verb)
Examples of word cannibalise
"(Also) I think we need to be careful about the use of the word 'cannibalise' which brings with it an imputation of bad behaviour."
"cannibalise" doctors and patients from existing general practices.
"cannibalise" when asking about the possibility super clinics would poach doctors.
The split favours both films because they can't cannibalise each other.
It's possible, the two will cannibalise each other's markets, or that the cheaper handheld will draw complaints about the price point of the more expensive machine.