methylnaphthalene

[ meth-uh l-naf-thuh-leen, -nap- ]
/ ˌmɛθ əlˈnæf θəˌlin, -ˈnæp- /

noun Chemistry.

a compound, C11H10, whose alpha isomer, a colorless liquid, is used in determining cetane numbers.

Origin of methylnaphthalene

First recorded in 1880–85; methyl- + naphthalene

British Dictionary definitions for methylnaphthalene

methylnaphthalene
/ (ˌmiːθaɪlˈnæpθəˌliːn) /

noun

either of two isomeric derivatives of naphthalene: a liquid (1-methylnaphthalene), used in standardizing diesel fuels, or a solid (2-methylnaphthalene), an insecticide