Crude oil is the thick dark liquid pumped from underground. A barrel of crude oil.
It is useless until separated, and a refinery splits it by boiling point into everything from petrol to tar. Crude oil varies from almost water-thin to something that will not pour.
1nouncrude oilThe thick dark liquid pumped from underground.
“Crude oil fell below thirty dollars that spring.”
crude oil is a liquid.
Practised in Materials & Substances