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Oil Definition: Crude, Cooking & Lubricant Uses (3 meaning)
Meaning 1：crude petroleum liquid (oil)
oil
/ɔɪl/
n.
A thick, black liquid found under the ground, used to make fuel (like gasoline) and many other products.
crude petroleum liquid
➕
/kruːd pəˈtroʊliəm ˈlɪkwɪd/
n.
A thick, dark, flammable liquid found underground, composed of hydrocarbons, extracted and refined into fuels like gasoline and diesel, as well as plastics and lubricants.
📘 Details & Usage
📖 Root Explanation
From Old French 'oile', Latin 'oleum' (olive oil), from Greek 'elaion' (olive tree oil).
💡 Mnemonic
Think of 'oil' sounds like 'toil' – because extracting oil requires hard work.
📖 Example
Many modern cars still rely on oil to run, but electric vehicles are becoming more popular.
Many modern cars still rely on oil to run, but electric vehicles are becoming more popular.
🔗 Collocations
crude oil – Petroleum in its natural state before refining.
oil well – A hole drilled into the earth to extract petroleum.
oil refinery – An industrial plant where crude oil is processed into useful products.
🔄 Synonyms
petroleum (n.) – A liquid mixture of hydrocarbons found in geological formations, used as fuel and raw material.
crude (n.) – Unrefined petroleum, often used as a shorthand for crude oil.
black gold (n.) – A figurative term for oil, highlighting its high economic value.
🚫 Antonyms
renewable energy (n.) – Energy sources like solar or wind that are sustainable and not derived from fossil fuels.
🌱 Derivatives
📖 Cultural Story
The word 'oil' entered English via Anglo-Norman French 'oile', tracing back to Latin 'oleum' and Greek 'elaion'. The global petroleum industry's rise in the 19th century made 'oil' synonymous with crude oil, a key economic and geopolitical resource. The 'oil crisis' of 1973 shaped modern energy policy.
Meaning 2：cooking fat from plants (oil)
oil
/ɔɪl/
n.
A smooth, thick liquid made from plants or animals, used for frying or cooking food.
cooking fat from plants
➕
/ˈkʊkɪŋ fæt frəm plænts/
n.
A fatty liquid obtained from plants (olives, sunflowers, canola, etc.) used for frying, baking, salad dressings, and as a source of dietary fat.
📘 Details & Usage
📖 Example
For a healthier salad, she drizzled some extra virgin olive oil over the fresh vegetables.
For a healthier salad, she drizzled some extra virgin olive oil over the fresh vegetables.
🔗 Collocations
olive oil – Oil pressed from olives, used in cooking and dressings.
vegetable oil – Oil extracted from seeds, nuts, or grains, commonly used for frying.
cooking oil – Any oil suitable for frying or sautéing food.
🔄 Synonyms
🚫 Antonyms
water (n.) – A transparent liquid that does not mix with oil, used in cooking for boiling or steaming.
Meaning 3：lubricating fluid for machines (oil)
oil
/ɔɪl/
n.
A smooth liquid used on machine parts to make them move easily and quietly, and to stop them from rusting.
lubricating fluid for machines
➕
/ˈluːbrɪkeɪtɪŋ ˈfluːɪd fɔːr məˈʃiːnz/
n.
A viscous liquid used to reduce friction between moving parts, prevent wear, and protect against rust in mechanical devices such as engines, chains, and bearings.
📘 Details & Usage
📖 Example
The old bicycle chain was squeaking, so I applied some oil to make the ride smoother and quieter.
The old bicycle chain was squeaking, so I applied some oil to make the ride smoother and quieter.
🔗 Collocations
motor oil – Oil used to lubricate internal combustion engines.
lubricating oil – Oil specifically designed to reduce friction in machinery.
oil change – The process of replacing old motor oil with fresh oil in a vehicle.
🔄 Synonyms
🚫 Antonyms
abrasive (n.) – A rough material that wears away surfaces, opposite of a lubricant's smoothing effect.
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