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methylnaphthalene

[meth-uh l-naf-thuh-leen, -nap-]
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noun Chemistry.
  1. a compound, C11H10, whose alpha isomer, a colorless liquid, is used in determining cetane numbers.
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Origin of methylnaphthalene

First recorded in 1880–85; methyl- + naphthalene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for methylnaphthalene

methylnaphthalene

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