Simple Definition of essential oil

from our Learner's Dictionary

essential oil

noun

plural essential oils
: an oil that comes from a plant, that smells like the plant it comes from, and that is used in perfumes and flavorings

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“Essential oil.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/essential%20oil. Accessed 15 Apr. 2026.

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