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[bahy-prod-uh kt] /ˈbaɪˌprɒd əkt/
a secondary or incidental product, as in a process of manufacture.
the result of another action, often unforeseen or unintended.
Origin of by-product
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for byproduct
  • Today's buttermilk is really fermented milk, different from the byproduct of butter-churning from olden days.
  • Retention and graduation rates are the byproduct of better educational experiences.
  • They feed whey, a byproduct of cheesemaking, to a herd of pigs.
  • Bitterness is a byproduct of the mustard reaction, but that bitterness fades after a day or so.
  • Desalinization is energy intensive and produces an extremely concentrated brine byproduct with detrimental environmental effects.
  • Sharks get hooked as a byproduct of other fisheries.
  • The yeast cells release ethanol as a byproduct of their metabolism, and the ethanol can be distilled to make it more concentrated.
  • It's partially a byproduct of the global economic crisis.
  • Other technologies such as hydrogen engines would be a better alternative given their byproduct will not harm the environment.
  • The nuke problems is the byproduct of design failure.
British Dictionary definitions for byproduct


a secondary or incidental product of a manufacturing process
a side effect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for byproduct



also byproduct; 1857, from by + product.

Online Etymology Dictionary, © 2010 Douglas Harper
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byproduct in Science
Something produced in the process of making something else. When plants produce carbohydrates by photosynthesis, oxygen is released as a by-product. Asphalt and paraffin are by-products of the process of refining crude oil into gasoline.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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