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

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

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

From Salon • Jul. 30, 2024

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

Unfortunately, as the doctor appears not to have known, lead is not excreted as a waste product.

From "A Short History of Nearly Everything" by Bill Bryson