Etymology
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menthol (n.)

white crystalline substance, 1862, from German Menthol, coined 1861 by Alphons Oppenheim from Latin mentha "mint" (see mint (n.1)) + oleum "oil" (see oil (n.)). So called because it was first obtained from oil of peppermint. Menthol cigarette is by 1934.

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mentholated (adj.)

of cigarettes, 1933, an advertiser's word, from menthol + -ate (2).

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