crude oil

crude oil — noun

1. thick, dark oil found underground that is taken from the ground and later proces

1.nounB2
Definition

thick, dark oil found underground that is taken from the ground and later processed to make fuel, plastic, and other products.

Example

A massive tanker carrying crude oil from Saudi Arabia arrived at the port yesterday.

collocation: crude oil + from [region] + arrive at [port]

When crude oil prices fell below forty dollars, the oil company stopped drilling.

collocation: crude oil prices fall / rise

Common collocations
  • crude oil prices
  • crude oil production
  • crude oil exports / imports
  • crude oil reserves
  • crude oil refinery
  • crude oil spill
  • crude oil tanker
  • crude oil drilling
  • crude oil pipeline
  • barrel of crude oil
Synonyms
  • petroleum

    broader term; 'petroleum' can refer to both crude oil and refined products, while 'crude oil' specifically means unrefined oil.

  • oil

    shorter everyday term; often means crude oil in the context of energy markets or drilling.

  • black gold

    informal, figurative nickname highlighting the high value of crude oil.

Antonyms
  • refined oil

    crude oil after processing; includes petrol, diesel, kerosene, and other products.

Grammar Patterns

crude oil + is/comes from

crude oil + verb (singular)

Usage Note

Uncountable noun — use 'crude oil' without an article ('a crude oil') unless referring to a specific grade ('a light crude oil'). The price of crude oil is reported in US dollars per barrel.

Common Mistakes

The country exports a crude oil to Japan.
The country exports crude oil to Japan.
crude oil is uncountable; do not use 'a'.
Crude oils are getting more expensive.
Crude oil is getting more expensive.
in the general sense, treat it as a single uncountable commodity.

Word family

Synonym discussion

Sense: noun/1

Petroleum is the broadest term, covering both crude oil and the refined products made from it. Oil is the most common everyday word and is used in general contexts such as 'oil prices' or 'oil industry', though it can also refer to cooking oils. Crude oil specifically describes the unprocessed, raw material taken directly from the ground — a distinction that matters in technical and trading contexts (e.g. a 'crude oil futures contract' is different from a 'petroleum product contract'). Black gold is an informal, journalistic nickname that emphasises the economic value of crude oil but is rarely used in serious business or technical writing. Fossil fuel is the broadest category, which includes crude oil, natural gas, and coal. In practice, if you are discussing the raw material before it reaches a refinery, 'crude oil' is the precise term; for discussions about energy markets or everyday usage, both 'crude oil' and 'oil' work, but 'crude oil' is clearer for non-native speakers because it removes the ambiguity with cooking oil.

petroleum ↗oil ↗black gold ↗fossil fuel ↗

Common collocations

Nouns

Phrases

  • barrel of crude oil
  • crude oil futures
  • crude oil output
  • crude oil supply

Prepositions

  • crude oil from [region]
  • crude oil to [destination]
  • crude oil per barrel

Etymology

LatinOld FrenchEnglishGreek

The word 'crude' comes from Latin 'crudus', meaning 'raw, rough, unripe', and entered English through Old French 'crud'. It has been used since the 14th century to describe things in their natural or unrefined state. 'Oil' traces back to Latin 'oleum' (olive oil), from Greek 'elaion', related to 'elaia' (olive). The compound 'crude oil' was first recorded in English in the mid-19th century, when the modern petroleum industry began, to distinguish the raw material pumped from the ground from the refined products like kerosene and petrol.