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.
The sector's growth shines through in traditional petroleum products, petrochemicals, and renewable energy sources, all of which play a crucial role in strengthening India's energy security and economic development. Sarwant Singh, Forbes.com, 14 July 2025 Before the full-scale invasion of Ukraine in 2022, the U.S. imported several key commodities from Russia, including crude oil, refined petroleum products, metals like aluminum and palladium, and fertilizer. Gabe Whisnant, MSNBC Newsweek, 14 July 2025 Patrick De Haan — head of petroleum analysis at GasBuddy, which, in addition to AAA, also tracks how much gasoline is selling for at the pump — predicted prices will remain well under $4 a gallon throughout the summer. Frank Witsil, Freep.com, 14 July 2025 China and India buy 70 percent of Russian oil and gas and other petroleum products. Alexander Bolton, The Hill, 9 July 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

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Cite this Entry

“Petroleum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/petroleum. Accessed 21 Jul. 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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