chemical warfare

noun
warfare with asphyxiating, poisonous, or corrosive gases, oil flames, etc.

Origin:
1915–20

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World English Dictionary
chemical warfare
 
n
warfare in which chemicals other than explosives are used as weapons, esp warfare using asphyxiating or nerve gases, poisons, defoliants, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Cultural Dictionary

chemical warfare definition


The use of chemical agents as a weapon of war or terror. From the mustard gas used in World War I to the highly lethal neurotoxin Sarin that is potentially available for use today, chemicals are considered a weapon of mass destruction, and their use is condemned by most civilized nations.

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
He went on to make lethal gas for chemical warfare and genocide.
In this age of looming bioterrorism, keeping chemical warfare vapors off of
  soldiers is a primary military concern.
The amazing thing about this chemical warfare is that it has evolved
  independently several times.
Ok, so keep fighting your chemical warfare against disease because you will
  never win.
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