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

Furthermore, the molecularly evolved enzyme also exhibited conversion activity towards p-coumaric acid and sinapic acid, which are compounds obtained from the degradation of lignin -- a common agricultural waste product.

From Science Daily • May 16, 2024

Suddenly the manure would become a waste product.

From "The Omnivore's Dilemma" by Michael Pollan