petroleum
Translation
petroleum, crude oil
Examples
Petroleum is a major source of energy.
Petroleum is a major source of energy.
The price of petroleum has increased.
The price of petroleum has increased.
Grammar Patterns
((uncountable)) petroleum Petroleum is a fossil fuel.
Similar Words
Synonyms: crude oil, oil
Etymology
From Latin 'petra' (rock) and 'oleum' (oil). It literally means 'rock oil'.
Memory Tips
Break it down: 'petro' (rock) + 'leum' (oil). It's oil that comes from rocks deep underground.