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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
Each one has a small toy inside and is fragranced with essential oils.
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Bestreviews, Chicago Tribune, 6 Feb. 2025
They’re infused with natural essential oils and made of natural soy wax.
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Bestreviews, The Mercury News, 4 Feb. 2025
As long as there is no allergic or adverse reaction to the essential oils, which should always be diluted with carrier oils like coconut, jojoba or sweet almond oil, there is no harm in trying them.
—
Eva Crouse, Flow Space, 31 Jan. 2025
For instance, one team of researchers discovered that rosemary essential oil was just as effective as minoxidil in promoting hair growth.
—
Sherri Gordon, Health, 8 Jan. 2025
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Word History
First Known Use
1674, in the meaning defined above
Dictionary Entries Near essential oil
Cite this Entry
“Essential oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/essential%20oil. Accessed 12 Feb. 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 oilMore from Merriam-Webster on essential oil
Britannica.com: Encyclopedia article about essential oil
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