Agent Orange (n.)youdaoicibaDictYouDict[Agent Orange 词源字典]
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.[Agent Orange etymology, Agent Orange origin, 英语词源]