Essential oil

Essential oil
An oil derived from a natural substance, usually either for its healing properties or as a perfume. Some pharmaceuticals, and many over-the-counter or “holistic” remedies, are based on or contain essential oils. Examples include products containing camphor or eucalyptus that help relieve congestive coughs, and the essential oils used in the practice of aromatherapy.

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essential oil n 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 usu. 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

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a volatile oil derived from an aromatic plant. Essential oils are used in various pharmaceutical preparations.

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ethereal oil volatile o.

Medical dictionary. 2011.

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