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catalytic converter - A device with a catalyst for converting pollutant gases into less harmful ones. More...
allergen - Though allergens are not harmful themselves, when they are combined with certain antibodies, a reaction (i.e. the allergy) liberates substances that damage body cells and tissues. More...
intrigant - A person who plots something illicit or harmful. More...
nocuous - Meaning "harmful, noxious," it is based on Latin nocere, "to hurt." More...
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