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petroleum
noun
pe·tro·leum
pə-ˈtrō-lē-əm
-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
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
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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
Phrases Containing petroleum
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
-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
pe·tro·leum
pə-ˈtrō-lē-əm, -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
More from Merriam-Webster on petroleum
Nglish: Translation of petroleum for Spanish Speakers
Britannica English: Translation of petroleum for Arabic Speakers
Britannica.com: Encyclopedia article about petroleum
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