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.

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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.

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Etymology

Origin of waste product

First recorded in 1930–35

Example Sentences

After it has been used, creatine breaks down into creatinine, a waste product that is filtered out by the kidneys and removed through urine.

From Science Daily • May 4, 2026

And he still had to find something to do with the waste product that resulted from the kerosene-making process: gasoline.

From Barron's • May 2, 2026

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

And the primary waste product, called pomace, can be used as fertilizer, perhaps to grow new apple trees.

From Salon • Jul. 30, 2024

However they had gotten there, Spirit Lake was now their home, and their photosynthesis was creating oxygen as a waste product.

From "Mountain of Fire" by Rebecca E. F. Barone