Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A liquid or gaseous fuel derived from coal, shale, or tar sand, or obtained by fermentation of certain substances, such as grain.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of several fuels synthesized from coal or shale etc, or fermented from grain etc

Etymologies

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

[syn(thetic) + fuel.]

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