by-product
US /ˈbaɪˌprɑː.dʌkt/
UK /ˈbaɪˌprɑː.dʌkt/
1.
an incidental or secondary product made in the manufacture or synthesis of something else
:
•
The chemical process yields a useful by-product.
•
Waste materials are often a by-product of industrial production.
2.
a secondary or incidental result of a process or action
:
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Stress is a common by-product of modern life.
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The increased traffic was an unfortunate by-product of the new development.