n 1 : a substance considered to possess in high degree the predominant qualities of a natural product (as a plant or drug) from which it is extracted (as by distillation or infusion) 2 a : ESSENTIAL OIL b : an alcoholic solution esp. of an essential oil < of peppermint> c : an artificial preparation (as an alcoholic solution of one or more esters) used esp. in flavoring <pineapple > d : ELIXIR <pepsin > .
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