fossil fuel Hear it!

fossil fuel definition

fossil fuel

an organic substance, as coal, petroleum, etc., found underground in deposits formed in a previous geologic period and used as a source of energy

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.