yellow-rain

yellow rain

noun
small, powdery yellow deposits containing the fungal toxin tricothecene, found on leaves and other surfaces in Southeast Asia and Afghanistan in the early 1980s and alleged by some to be a chemical weapon disseminated by air but claimed by others to be pollen-containing bee excrement contaminated by fungus.

Origin:
1975–80

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Collins
World English Dictionary
yellow rain
 
n
a type of yellow precipitation described in parts of SE Asia and alleged by some to be evidence of chemical warfare using mycotoxins

Collins English Dictionary - Complete & Unabridged 10th Edition
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