Longman Dictionary of Contemporary English
Wiktionary
n. 1 an unwanted material produced during some manufacturing process, especially radioactive material from nuclear reactors 2 the unwanted results of metabolism, expelled in the urine and faeces
WordNet
n. any materials unused and rejected as worthless or unwanted; "they collect the waste once a week"; "much of the waste material is carried off in the sewers" [syn: waste, waste material, waste matter]
Usage examples of "waste product".
It was an industrial waste product from the manufacture of sulfur.
The fuel basically comes from water and the waste product is helium: inert and safe.
After extraction of the Liquorice, the crushed root was formerly considered a waste product and destroyed by burning, but under a recently discovered process this refuse can now be made into a chemical wood pulp and pressed into a board that is said to have satisfactory resisting qualities and strength.
Based on the idea of photosynthesis, the air-renewer had been designed to break down the carbon dioxide waste product of breathing by turning it into sugar and free oxygen, as a plant does, and permit the same air being used over and over.
The dissolved silica reacts with sodium aluminate to form sodium hydroaluminosilicate, which is essentially a waste product.
Unfortunately, as the doctor appears not to have known, lead is not excreted as a waste product.
The chemists discarded the most volatile fraction (gasoline) as an unfortunate waste product—.
The chemists discarded the most volatile fraction (gasoline) as an unfortunate waste product--until it was found to be an ideal fuel for internal-combustion engines.
But Haplo saw that the water was merely a by-product of the Kicksey-Winsey, perhaps even a waste product.
Meg knew that in recent years genetic engineering had produced a man-made virus that threw off pure insulin as a waste product, a multitude of wonder drugs, and other blessings.
Already, such research had created strains of corn and wheat that could grow with less water and in poor soil, relieving world hunger, and years ago they had developed a man-made virus that, as a waste product, produced cheap insulin.
Calling it a saleable commodity--not a waste product it escapes environmental regulation.
But it was a scavenger and there was no waste product it would not devour.