Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.
by-product noun 1 a secondary and often commercially important product that is formed at the same time as the main product during a chemical reaction or manufacturing process. 2 an unexpected or extra result; a side effect. Compare end product.
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