English

Definition of petroleum noun from the Oxford Advanced Learner's Dictionary

 

petroleum

 noun
noun
BrE BrE//ˈtrəʊliəm//
 
; NAmE NAmE//ˈtroʊliəm//
 
[uncountable]
 
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mineral oil that is found under the ground or the sea and is used to produce petrol/gas, paraffin, diesel oil, etc. The government suspended its supplies of petroleum to the country as a result of the crisis. There were still 30 million barrels of refined petroleum in storage. Word Origin late Middle English: from medieval Latin, from Latin petra ‘rock’ (from Greek) + Latin oleum ‘oil’.
See the Oxford Advanced American Dictionary entry: petroleum

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