"yellow rain." YourDictionary, n.d. Web. 15 October 2018. <http://www.yourdictionary.com/yellow-rain>.
yellow rain. (n.d.). Retrieved October 15th, 2018, from http://www.yourdictionary.com/yellow-rain
A powdery yellow substance that was reported in the 1970s and 1980s to drop from the air in Southeast Asia, claimed by the United States to be a fungal toxin used as a chemical weapon by the Soviet Union and later claimed by certain investigators to consist of the excrement of large swarms of bees.