petroleum

noun

pe·​tro·​leum pə-ˈtrō-lē-əm How to pronounce petroleum (audio)
-ˈtrōl-yəm
: an oily flammable bituminous liquid that may vary from almost colorless to black, occurs in many places in the upper strata of the earth, is a complex mixture of hydrocarbons with small amounts of other substances, and is prepared for use as gasoline, naphtha, or other products by various refining processes

Examples of petroleum in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Unless Canadian oil is excluded from the tariffs, gas prices could jump by 20 to 50 cents a gallon in the Great Lakes region because refineries there are most reliant on Canadian oil, Patrick De Haan, head of petroleum analysis at GasBuddy, told CNN. Matt Egan, CNN, 24 Jan. 2025 The cyclical nature of petroleum production, with prices that cycle between high and low and many companies getting crushed in the markets, have everything to do with the interplay of supply and demand. Erik Sherman, Forbes, 20 Jan. 2025 The two facilities produce various petroleum products and about 8% of the state’s gasoline. Noah Haggerty, Los Angeles Times, 16 Jan. 2025 These technologies have revolutionized petroleum and natural gas production and made the U.S. the world’s largest producer of oil and natural gas. Margaret E. Kosal, The Conversation, 12 Jan. 2025 See all Example Sentences for petroleum 

Word History

Etymology

Middle English, "mineral oil," borrowed from Medieval Latin, "mineral oil, crude oil," from Latin petra "rock" (borrowed from Greek pétra) + oleum "oil" — more at petro-, oil entry 1

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of petroleum was in the 15th century

Dictionary Entries Near petroleum

Cite this Entry

“Petroleum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/petroleum. Accessed 2 Feb. 2025.

Kids Definition

petroleum

noun
pe·​tro·​leum pə-ˈtrō-lē-əm How to pronounce petroleum (audio)
-ˈtrōl-yəm
: an oily flammable liquid that may vary from almost colorless to black, is obtained from wells drilled in the ground, and is the source of gasoline, kerosene, fuel oils, and other products

Medical Definition

petroleum

noun
: an oily flammable bituminous liquid that may vary from almost colorless to black, occurs in many places in the upper strata of the earth, is a complex mixture of hydrocarbons with small amounts of other substances, and is prepared for use as gasoline, naphtha, or other products by various refining processes

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