by-product
🇺🇸
/ˈbaɪ prɑːdʌkt/
🇬🇧
/ˈbaɪ prɒdʌkt/
Something made while making something else.
A common by-product of making cheese is whey.
Something that happens because of something else.
A rise in pollution is a by-product of the city's increased traffic.