to remove parts, equipment, assets, employees, etc., from (an item, product, or business) in order to use them in another: to cannibalize old airplanes for replacement parts.
3.
to cut into; cause to become reduced; diminish: New products introduced in the next six months will cannibalize sales from established lines.
"take parts from one construction and use them in another," 1943, originally of military equipment, from cannibal + -ize. Cannibalization is recorded from 1947.