Etymology
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Valium (n.)
1961, proprietary name (Hoffmann-La Roche Inc., Nutley, N.J.) of diazepam (reg. U.S.), of unknown origin.
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diazepam (n.)

"Valium," 1961, from (benzo)diazep(ine) + -am, apparently an arbitrary suffix. The element diazo- denotes two nitrogen atoms combined with one hydrocarbon radical.

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