essential oil

American  

noun

• essential oils
  plural

1. any of a class of volatile oils obtained from plants, possessing the odor and other characteristic properties of the plant, used chiefly in the manufacture of perfumes, flavors, and pharmaceuticals.

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essential oil British  

noun

1. any of various volatile organic oils present in plants, usually containing terpenes and esters and having the odour or flavour of the plant from which they are extracted: used in flavouring and perfumery Compare fixed oil See also oleoresin

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essential oil Scientific  

/ ĭ-sĕn′shəl /

1. Any of various volatile liquids, such as rose oil or lavender oil, that have a characteristic odor and are produced by plants. Essential oils are composed primarily of terpenes and of lesser quantities of alcohols, aldehydes, esters, phenols, and other compounds that impart particular odors or flavors. They are used to make perfumes, soaps, flavorings, and other products.

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Other Word Forms

Noun Inflected Forms

• essential oils
  plural

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Etymology

Origin of essential oil

First recorded in 1665–75

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Example Sentences

See Examples For:

essential oil

Participants only needed to place a small amount of essential oil near their beds.

From Science Daily ● Oct. 6, 2026

"Our findings suggest that repeated use of Hinoki root essential oil at home may support sleep initiation, sleep continuity, and feeling refreshed in the morning."

From Science Daily ● Oct. 6, 2026

A woman sprayed each of us with rose essential oil to help with grounding.

From Slate ● Sep. 22, 2026

Switch between the sauna and the steam room, with the option to spritz the space with eucalyptus essential oil.

From Seattle Times ● Jan. 20, 2024

Inside were six bottles of tincture, two vials of essential oil, and a bag of white clay.

From "Educated" by Tara Westover

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