pathogenic

[path-uh-jen-ik]
adjective
Pathology. capable of producing disease: pathogenic bacteria.

Origin:
1850–55; patho- + -genic

antipathogenic, adjective
nonpathogenic, adjective
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Collins
World English Dictionary
pathogenic (ˌpæθəˈdʒɛnɪk)
 
adj
able to cause or produce disease: pathogenic bacteria

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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Etymonline
Word Origin & History

pathogenic
"producing disease," 1852, from Fr. pathogénique, from Gk. pathos "disease" (see pathos) + Fr. génique "producing." Earlier pathogenetic (1838). Related: Pathogenicity.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

pathogenic path·o·gen·ic (pāth'ə-jěn'ĭk) or path·o·ge·net·ic (-jə-nět'ĭk)
adj.

  1. Having the capability to cause disease.

  2. Producing disease.

  3. Relating to pathogenesis.


path'o·ge·nic'i·ty (-jə-nĭs'ĭ-tē) n.
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
Cultural Dictionary
pathogenic [(path-uh-jen-ik)]

A descriptive term for a thing or condition that can cause disease.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Meanwhile the virus has undergone huge genetic changes and become even more
  pathogenic.
The combination of heat and the sun's ultraviolet rays kills any pathogenic
  germs.
The smaller chromosome seems to contain many of the genetic elements that make
  the cholera organism pathogenic.
He said he feared the plant would harbor pathogenic bacteria and emit gases.
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