英语词汇tranquilizer的起源、历史背景-英语词源词典

词汇	tranquilizer
词源	tranquilizer. The world’s first tranquilizer was Reserpine, in- vented by British botanist Robert Robinson and Swiss pharma- cologist Emil Schittler in 1947, after testing it for more than five years. The tranquilizer came from the powdered white crystalline root of the sarpaganda shrub, which had been known for many years for its quieting effect.
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英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。