What does the word essential mean?
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The word essential has been applied to the immediate or active principles of vegetables, which were believed to be endowed with the properties of the plants from which they were extracted. Essential oil was so called because it was regarded as the only immediate principle which was essential. This expression is retained. Essential salts are true salts or extracts which exist, ready formed, in vegetables; and which are obtained by distillation, incineration, or some other process. An essential disease is synonymous with a general disease; that is, one not depending on any local affection, -not symptomatic. See Entity
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1. Necessary; characteristic; inherent. 2. Idiopathic.
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Each person working in the medical industry sometimes needs to know how to define a word from medical terminology. For example - how to explain essential? Here you can see the medical definition for essential. Medical-dictionary.cc is your online dictionary, full of medical definitions.