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pollutant

[puh-loot-nt] /pəˈlut nt/
noun
1.
something that pollutes.
2.
any substance, as certain chemicals or waste products, that renders the air, soil, water, or other natural resource harmful or unsuitable for a specific purpose.
Origin
1890-1895
1890-95; pollute + -ant
Related forms
nonpollutant, adjective, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for nonpollutant

pollutant

/pəˈluːtənt/
noun
1.
a substance that pollutes, esp a chemical or similar substance that is produced as a waste product of an industrial process
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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nonpollutant in Medicine

pollutant pol·lut·ant (pə-lōōt'nt)
n.
Something that pollutes, especially a waste material that contaminates air, soil, or water.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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nonpollutant in Science
pollutant
  (pə-lt'nt)   
A substance or condition that contaminates air, water, or soil. Pollutants can be artificial substances, such as pesticides and PCBs, or naturally occurring substances, such as oil or carbon dioxide, that occur in harmful concentrations in a given environment. Heat transmitted to natural waterways through warm-water discharge from power plants and uncontained radioactivity from nuclear wastes are also considered pollutants.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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