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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A crude oil that is obtained from oil shale by heating and distillation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a crude oil, containing hydrocarbons, obtained by the distillation of oil shale

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. oil extracted from oil shale by heating


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