[bahy-prod-uh kt]


a secondary or incidental product, as in a process of manufacture.
the result of another action, often unforeseen or unintended.

Nearby words

  1. by-name,
  2. by-numbers,
  3. by-path,
  4. by-play,
  5. by-plot,
  6. by-road,
  7. by-street,
  8. by-talk,
  9. by-work,
  10. by-your-leave

Origin of by-product

First recorded in 1900–05 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for byproduct

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

Word Origin and History for byproduct



also byproduct; 1857, from by + product.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for byproduct



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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.