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waste product

American  

noun

  1. material discarded as useless in the process of producing something.

  2. feces, urine, and other material excreted in the life process.

waste product Scientific  

  1. An unusable or unwanted substance or material produced during or as a result of a process, such as metabolism or manufacturing.

Etymology

Origin of waste product

First recorded in 1930–35

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The main solid waste product is phosphogypsum, which the plant discharges into the Mediterranean.

From Barron's • Oct. 10, 2025

The battery brining liquid is a hazardous waste product too and is trucked to another specialized facility, the agency said.

From Los Angeles Times • Apr. 9, 2025

In conclusion, rice bran, an agricultural waste product, is a source of therapeutic pdNPs that are affordable, effective, and safe, and has the potential to revolutionize cancer treatment in the future.

From Science Daily • Apr. 22, 2024

The powder is made from a purified plasma protein, a waste product of blood.

From BBC • Nov. 27, 2023

Suddenly the manure would become a waste product.

From "The Omnivore's Dilemma" by Michael Pollan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.