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crude oil
This term refers specifically to the raw, unprocessed state of petroleum. In industrial and economic contexts, it is used to distinguish the raw material from "refined products" such as gasoline, kerosene, or heating oil. The word "crude" here functions as a technical descriptor meaning raw or unrefined, rather than its common meaning of lacking tact or sophistication.
As a mass noun, it describes a substance rather than individual units. It is never used in the plural form "crude oils" unless referring to different types or grades of oil from various geographical sources in a technical geological or chemical comparison.
Meanings
Examples
The price of crude oil plummeted after the agreement was signed.
We need to find a way to reduce our dependence on crude oil.
The tanker was carrying two million barrels of crude oil.
I wonder if the global supply of crude oil will stabilize this year.
The spill leaked thousands of gallons of crude oil into the ocean.
The industrial revolution was fueled in part by the discovery of crude oil.
The industrial revolution was fueled in part by the discovery of crude oil.
How much crude oil does the refinery process per day?