Focus on the pronunciation of by-product
English definition of “by-product”
/ˈbaɪˌprɒdʌkt/ noun [C]
› PRODUCTION something that is produced as a result of making something else: a by-product of sth Selenium is a by-product of copper refining. oil/animal/chemical by-products
› something not expected or not intended that happens as a result of something else: a by-product of sth Higher than expected tax revenues were a by-product of the booming economy.