Definition of water-fennel oil
: an essential oil containing phellandrene and phellandral obtained from a water fennel (Oenanthe aquatica)
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“Water-fennel oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water-fennel%20oil. Accessed 9 Aug. 2022.
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