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NCI Dictionary of Cancer Terms

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adulterant  listen  (uh-DUL-teh-runt)

  A substance added to a product but not listed as an ingredient, or a substance that ends up in a product by accident when the product is made. Adulterants may be in foods, drugs, and other products. An adulterant may cause a product to be harmful, cheaper to make, or not work as it should.