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

Using a single blind crossover design, every participant spent two weeks using Hinoki root essential oil and another two weeks using an unscented control.

From Science Daily ● Oct. 6, 2026

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

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

Lin says, holding a bottle of green tea essential oil under my nose.

From Los Angeles Times ● Jun. 11, 2025

Inside, it’s softly lit and smells like a combination of the lavender essential oil mixture we use on the bedding and something pungent and medicinal.

From "The Wrong Way Home" by Kate O’Shaughnessy

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