Agronomy/chemistry term. Chinese names a pesticide componentially:
甲 "methyl,"
氰 "cyano,"
菊酯 "pyrethrin ester" - i.e. the methyl-cyano member of the pyrethroid family. Most pyrethroid names in Chinese end in
菊酯, e.g.
氯氰菊酯 (cypermethrin),
溴氰菊酯 (deltamethrin).
