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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Le Père Blaize, the sixth-generation herbalist’s shop, is the place to go for teas, essential oils and medicinal elixirs. Lily Radziemski, New York Times, 29 May 2025 Folded with flour or curd, stirred with essential oils, or bathed in milk and sandalwood, it’s lifted from the everyday and pressed into skin like a blessing made visible. Sara Hussain, Vogue, 22 May 2025 Using lavender to create an insect repellent will vary widely if it's made from fresh or dried plants or an essential oil. Lauren David, Southern Living, 14 May 2025 The blend of essential oils, including chamomile and lavender, will transform your bedroom into a serene oasis. Blake Bakkila, Architectural Digest, 1 May 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 14 Jun. 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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