Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A hydrocarbon-based fuel, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun any fuel derived from
hydrocarbon deposits such ascoal ,petroleum ,natural gas and, to some extent,peat ; these fuels areirreplaceable , and their burning generates thegreenhouse gas carbon dioxide
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
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