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Longman Dictionary of Contemporary English
cooking oil
noun
EXAMPLES FROM CORPUS
▪ A man who'd been scalded in the kitchens by cooking oil.
▪ An anonymous donor had given 20 gallons of cooking oil, desperately needed in the stricken country.
▪ But aid agencies report tens of thousands families so poor that they need help procuring flour, cooking oil and other basics.
▪ Finally, coat with a fine film of cooking oil before storing for long periods.
▪ Mix used cooking oil into your hoof oil to make it go further.
▪ Oilseed rape is likely to be engineered to produce more than one type of oil: for margarine, cooking oil or lubrication.
▪ Or add a cup each of vinegar and cooking oil.
▪ Twice a year we get two pounds of cooking oil, and only five bars of soap for a whole year.
Wiktionary
cooking oil

n. A purified fat taken from plant material that is commonly used in cooking, e.g. olive oil, canola oil, sunflower oil, etc.

WordNet
cooking oil

n. any of numerous vegetable oils used in cooking

Wikipedia
Cooking oil

Cooking oil is plant, animal, or synthetic fat used in frying, baking, and other types of cooking. It is also used in food preparation and flavouring not involving heat, such as salad dressings and bread dips, and in this sense might be more accurately termed edible oil.

Cooking oil is typically a liquid at room temperature, although some oils that contain saturated fat, such as coconut oil, palm oil and palm kernel oil are solid.

There are a wide variety of cooking oils from plant sources such as olive oil, palm oil, soybean oil, canola oil ( rapeseed oil), corn oil, peanut oil and other vegetable oils, as well as animal-based oils like butter and lard.

Oil can be flavoured with aromatic foodstuffs such as herbs, chillies or garlic.

Usage examples of "cooking oil".

The room was drab with old sofas and old chairs and old grimy curtains, the sweet-rank smell of opium and cooking oil on the air.

A package deal could be made to purchase the cooking oil, the pork drippings, and the lard given off by cooked beef or mutton along with the butter.

Furious, he had a cask of cooking oil brought up, broken open and spilled down the cliff wall, then ignited.

Say, one and a quarter kilos of bread and half a kilo of meat or cheese or beans a day per man, not to mention cooking oil, fuel .

Say, one and a quarter kilos of bread and half a kilo of meat or cheese or beans a day per man, not to mention cooking oil, fuel .