- a secondary or incidental product, as in a process of manufacture.
- the result of another action, often unforeseen or unintended.
Origin of by-product
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for by-product
What if violence against women is not a by-product of war, but rather a major cause of it?The Hidden Link Between Women and War
December 3, 2014
But those long wait times are not necessarily a by-product of their single-payer system.Fact-Checking Suzanne Somers’s Claim That Obamacare is a Socialist Ponzi Scheme
October 30, 2013
The by-product of a choice to live in public; to put your information online.The Internet Shouldn’t Own You
October 10, 2013
With regard to leather, this material is, under present conditions, a 'by-product.'No Animal Food
Rupert H. Wheldon
Nor is there any satisfactory application of this by-product as yet evolved.Researches on Cellulose
C. F. Cross
As silver is now obtained largely as a by-product, there is almost no waste.Checking the Waste
Mary Huston Gregory
It is not a by-product, but an essential part of the animal's equipment.The Story of the Mind
James Mark Baldwin
It is prepared commercially as a by-product in the steel-plate mills.An Elementary Study of Chemistry
- 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 by-product
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.