One of the mysteries of the English language finally explained.
The barbiturate butobarbitone, formulated as a tablet and used as a sedative and hypnotic. [Butobarbitone is 5-butyl-5-ethylbarbituric acid, C10H16N2O3. A trademark in the United Kingdom.]
1920s; earliest use found in Pharmaceutical Journal. From French Sonéryl from a first element of unknown origin + -yl.
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