Definition of biofuel noun from the Oxford Advanced American Dictionary

 

biofuel

 noun
noun
NAmE//ˈbaɪoʊˌfyuəl//
 
, NAmE//ˈbaɪoʊˌfyul//
 
[countable, uncountable]
 
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fuel made from plant or animal sources and used in engines biofuels made from sugar cane and sugar beet energy from biofuel sources
See the Oxford Advanced Learner's Dictionary entry: biofuel