methylnaphthalene

American

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

noun

Chemistry.

a compound, C 1 1 H 1 0 , whose alpha isomer, a colorless liquid, is used in determining cetane numbers.

methylnaphthalene British

/ 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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of methylnaphthalene

First recorded in 1880–85; methyl- + naphthalene

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023