| essence |
kernel: the choicest or most essential or most vital part of some idea or experience; "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story" any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted effect: the central meaning or theme of a speech or literary work perfume: a toiletry that emits and diffuses a fragrant odor
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| essential |
absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker" basic and fundamental; "the essential feature" all-important(a): of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence" being or relating to or containing the essence of a plant etc; "essential oil" substantive: defining rights and duties as opposed to giving the rules by which rights and duties are established; "substantive law" necessity: anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained" absolutely required and not to be used up or sacrificed
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| essential amino acid |
an amino acid that is required by animals but that they cannot synthesize; must be supplied in the diet
출처: wordnet.princeton.edu/perl/webwn
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| essential hypertension |
persistent and pathological high blood pressure for which no specific cause can be found
출처: wordnet.princeton.edu/perl/webwn
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| essential oil |
an oil having the odor or flavor of the plant from which it comes; used in perfume and flavorings
출처: wordnet.princeton.edu/perl/webwn
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