ˈspin-off BrE AmE , spin‧off /ˈspɪnɒf $ -ɒːf/ noun [countable]
1 . a television programme involving characters that were previously in another programme or film
2 . a separate and partly independent company that is formed from parts of an existing company, or the action of forming a company in this way
3 . an unexpected but useful result of something, that happens in addition to the intended result:
Laser research has had important spin-offs for eye surgery.