Definition of "carcinogen" [car•cin•o•gen]

• A cancer-causing substance or agent. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term carcinogen refers to any substance, radionuclide or radiation that is an agent directly involved in the promotion of cancer or in the ... en. wikipedia.org/wiki/Carcinogens"
• "* disclaimer: depending on your use of the term carcinogen and how far you want to take it then yes, all air is carcinogenic and pretty much every item you come in contact with is carcinogenic as well."
• "The carcinogen is often released by petrochemical plants and rubber and plastics manufacturers."