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Agent Orange

noun
1.
a powerful herbicide and defoliant containing trace amounts of dioxin, a toxic impurity suspected of causing serious health problems, including cancer and genetic damage, in some persons exposed to it and birth defects in their offspring: used by U.S. armed forces during the Vietnam War to defoliate jungles.
Origin
1965-1970
1965-70; so called from the color of the identifying stripe on the drums in which it was stored
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Agent Orange

Agent Orange

noun
1.
a highly poisonous herbicide used as a spray for defoliation and crop destruction, esp by US forces during the Vietnam War
Word Origin
C20: named after the identifying colour stripe on its container
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Agent Orange
n.

powerful defoliant used by U.S. military in the Vietnam War, attested from 1971, said to have been used from 1961; so called from the color strip on the side of the container, which distinguished it from Agent Blue, Agent White, etc., other herbicides used by the U.S. military. Banned from April 1970.

Online Etymology Dictionary, © 2010 Douglas Harper
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Agent Orange in Medicine

Agent Orange n.
A herbicide that contains trace amounts of the toxic contaminant dioxin, used in the Vietnam War to defoliate areas of forest.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Agent Orange in Science
Agent Orange  
A mixture of equal amounts of two herbicides known as 2,4-D and 2,4,5-T, and trace amounts of the toxic contaminant dioxin (a byproduct of the manufacture of 2,4,5-T). It was used in the Vietnam War to defoliate areas of forest.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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