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- DictionaryA·gent Or·ange/ˌāj(ə)nt ˈôr(ə)nj/
noun
- 1. a defoliant chemical used by the US in the Vietnam War.
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Agent Orange is a chemical herbicide and defoliant, one of the tactical use Rainbow Herbicides. It was used by the U.S. military as part of its herbicidal warfare program, Operation Ranch Hand, during the Vietnam War from 1961 to 1971. It is a mixture of equal parts of two herbicides, 2,4,5-T and 2,4-D. Wikipedia