Jisho

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Noun
1. oil; petroleum; kerosene
Wikipedia definition
2. PetroleumPetroleum. The Latin word petra is a loanword from Greek πέτρα. Petroleum or crude oil, is a naturally occurring flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. A fossil fuel, it is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure.
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