fossil fuel




WordReference Random House Unabridged Dictionary of American English © 2025
fos′sil fu′el, [Energy.]
  1. Energyany combustible organic material, as oil, coal, or natural gas, derived from the remains of former life.

Collins Concise English Dictionary © HarperCollins Publishers::
fossil fuel
  1. any naturally occurring carbon or hydrocarbon fuel, such as coal, petroleum, peat, and natural gas, formed by the decomposition of prehistoric organisms
'fossil fuel' also found in these entries (note: many are not synonyms or translations):
alternative energy - energy - gas

Forum discussions with the word(s) "fossil fuel" in the title:


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