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- DictionaryEs·sen·tial oil/əˈsen(t)SHəl oil/
noun
- 1. a natural oil typically obtained by distillation and having the characteristic fragrance of the plant or other source from which it is extracted.
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noun
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An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the oil of the plant from which they were extracted, such as oil of clove. An essential oil is essential in the sense that it contains the essence of the plant's ... Wikipedia