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noun meth·yl·naph·tha·lene \ˌme-thəl-ˈnaf-thə-ˌlēn, -ˈnap-\

Definition of methylnaphthalene

  1. :  either of two isomeric hydrocarbons C11H10; especially :  an oily liquid used in determining cetane numbers

Circa 1885

First Known Use of methylnaphthalene

circa 1885

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