car·cin·o·gen

[kahr-sin-uh-juhn, -jen, kahr-suh-nuh-jen, -noh-]
noun Pathology.
any substance or agent that tends to produce a cancer.

Origin:
1935–40; carcino- + -gen

car·cin·o·gen·ic [kahr-suh-nuh-jen-ik, -noh-] , adjective
car·ci·no·ge·nic·i·ty [kahr-suh-noh-juh-nis-i-tee] , noun
an·ti·car·cin·o·gen, noun
an·ti·car·cin·o·gen·ic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
carcinogen (kɑːˈsɪnədʒən, ˈkɑːsɪnəˌdʒɛn) [Click for IPA pronunciation guide]
 
n
pathol any substance that produces cancer
 
[C20: from Greek karkinoscancer + -gen]
 
carcino'genic
 
adj
 
carcinogen'icity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Carcinogen is always a great word to know.
So is slumgullion. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Etymonline
Word Origin & History

carcinogen
1853, from carcinoma + -gen "giving birth to" (see genus).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

carcinogen car·cin·o·gen (kär-sĭn'ə-jən, kär'sə-nə-jěn')
n.
A cancer-causing substance or agent.


car'cin·o·gen'ic (kär'sə-nə-jěn'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
carcinogen   (kär-sĭn'ə-jən)  Pronunciation Key 
A substance or agent that can cause cells to become cancerous by altering their genetic structure so that they multiply continuously and become malignant. Asbestos, DDT, and tobacco smoke are examples of carcinogens.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
It also has been linked to high blood cancer in adults and is a probably human
  carcinogen.
If absorbed in moderate doses only, it can be a carcinogen.
Cadmium is a carcinogen and long-term exposure leads to kidney and bone damage.
One of the chemicals is believed to be a carcinogen.
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