essential oil

noun

: any of a class of volatile oils that give plants their characteristic odors and are used especially in perfumes and flavorings, and for aromatherapy compare fixed oil

Examples of essential oil in a Sentence

Recent Examples on the Web
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In one study from 2009, his team ordered special concentrated essential oils made from Japanese cypress trees and then pumped them into the hotel rooms of test subjects using a diffuser. Malaka Gharib, NPR, 14 Mar. 2025 Rub the overnight foot cream formulated with ingredients like aloe, glycerin, urea, coconut oil, and lavender essential oil on your feet and pop it on the reusable pair of breathable foot sleeves. Nora Colomer, Fox News, 13 Mar. 2025 The reason for this is to promote flow – from the stems into the leaves – of the essential oils responsible for the herbs’ flavor. Joshua Siskin, Orange County Register, 27 Feb. 2025 Set on a secluded bay, this 88-key resort boasts large pool villas with thoughtful details like headrests built into the tub, a desk that transforms into a vanity, and a selection of essential oils and incense sticks. Christina Liao, Vogue, 21 Feb. 2025 See All Example Sentences for essential oil

Word History

First Known Use

1674, in the meaning defined above

Time Traveler
The first known use of essential oil was in 1674

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Cite this Entry

“Essential oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/essential%20oil. Accessed 30 Mar. 2025.

Medical Definition

essential oil

noun
: any of a large class of volatile odoriferous oils of vegetable origin that give plants their characteristic odors and often other properties, that are obtained from various parts of the plants (as flowers, leaves, or bark) by steam distillation, expression, or extraction, that are usually mixtures of compounds (as aldehydes or esters), and that are used often in the form of essences in perfumes, flavorings, and pharmaceutical preparations

called also ethereal oil, volatile oil

compare fatty oil, fixed oil

More from Merriam-Webster on essential oil

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