Meaning of methylnaphthalene

meth•yl•naph•tha•lene

Pronunciation: (meth"ul-naf'thu-lēn", -nap'-), [key]
— n. Chem.
  1. a compound, CH, whose alpha isomer, a colorless liquid, is used in determining cetane numbers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.