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Noun: byproduct  'bI,pró-dúkt
  1. A secondary and sometimes unexpected consequence
    - by-product
  2. A product made during the manufacture of something else
    - by-product, spin-off

Derived forms: by-products, byproducts

Type of: consequence, effect, event, issue, outcome, product, production, result, upshot

Encyclopedia: Byproduct