ESS : KMLE 의학 검색 엔진 - 의학사전, 의학용어, 의학약어, 의학논문, 약품/의약품 검색

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essay	Origin: F. Essai, fr. L. Exagium a weighing, weight, balance; ex out + agere to drive, do; cf. Examen, exagmen, a means of weighing, a weighing, the tongue of a balance, exigere to drive out, examine, weigh, Gr. 'exagion a weight, 'exagiazein to examine, 'exagein to drive out, export. See Agent, and cf. Exact, Examine, Assay. 1. An effort made, or exertion of body or mind, for the performance of anything; a trial; attempt; as, to make an essay to benefit a friend. "The essay at organization." 2. A composition treating of any particular subject; usually shorter and less methodical than a formal, finished treatise; as, an essay on the life and writings of Homer; an essay on fossils, or on commerce. 3. An assay. See Assay. Synonym: Attempt, trial, endeavor, effort, tract, treatise, dissertation, disquisition. 1. To exert one's power or faculties upon; to make an effort to perform; to attempt; to endeavor; to make experiment or trial of; to try. "What marvel if I thus essay to sing?" (Byron) "Essaying nothing she can not perform." (Emerson) "A danger lest the young enthusiast . . . Should essay the impossible." (J. C. Shairp) 2. To test the value and purity of (metals); to assay. See Assay. Origin: F. Essayer. See Essay. Source: Websters Dictionary (01 Mar 1998)
essence	1. The constituent elementary notions which constitute a complex notion, and must be enumerated to define it; sometimes called the nominal essence. 2. The constituent quality or qualities which belong to any object, or class of objects, or on which they depend for being what they are (distinguished as real essence); the real being, divested of all logical accidents; that quality which constitutes or marks the true nature of anything; distinctive character; hence, virtue or quality of a thing, separated from its grosser parts. "The laws are at present, both in form and essence, the greatest curse that society labors under." (Landor) "Gifts and alms are the expressions, not the essence of this virtue [charity]" (Addison) "The essence of Addison's humor is irony." (Courthope) 3. Constituent substance. "And uncompounded is their essence pure." (Milton) 4. A being; especially, a purely spiritual being. "As far as gods and heavenly essences Can perish." (Milton) "He had been indulging in fanciful speculations on spiritual essences, until . . . He had and ideal world of his own around him." (W. Irving) 5. The predominant qualities or virtues of a plant or drug, extracted and refined from grosser matter; or, more strictly, the solution in spirits of wine of a volatile or essential oil; as, the essence of mint, and the like. "The . . . Word essence . . . Scarcely underwent a more complete transformation when from being the abstract of the verb "to be," it came to denote something sufficiently concrete to be inclosed in a glass bottle." (J. S. Mill) 6. Perfume; odour; scent; or the volatile matter constituting perfume. "Nor let the essences exhale." (Pope) Origin: F. Essence, L. Essentia, formed as if fr. A p. Pr. Of esse to be. See Is, and cf. Entity. Source: Websters Dictionary (01 Mar 1998)
essence of rose	A volatile oil from the fresh flowers of Rosa gallica and R. Damascena and other members of the Rosaceae family. Used largely in perfumery; ointments, and toilet preparations. Synonym: attar of rose, essence of rose, otto of rose. (05 Mar 2000)
essene	Origin: Gr, lit, physicians, because they practiced medicine, fr. Chald asaya to heal, cf. Heb. Asa. One of a sect among the Jews in the time of our Savior, remarkable for their strictness and abstinence. Source: Websters Dictionary (01 Mar 1998)
essential	1. Belonging to the essence, or that which makes an object, or class of objects, what it is. "Majestic as the voice sometimes became, there was forever in it an essential character of plaintiveness." (Hawthorne) 2. Hence, really existing; existent. "Is it true, that thou art but a a name, And no essential thing?" (Webster (1623)) 3. Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. "Judgment's more essential to a general Than courage." (Denham) "How to live? that is the essential question for us." (H. Spencer) 4. Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil. "Mine own essential horror." 5. Necessary; indispensable; said of those tones which constitute a chord, in distinction from ornamental or passing tones. 6. <medicine> Idiopathic; independent of other diseases. <biology> Essential character, a class of volatile oils, extracted from plants, fruits, or flowers, having each its characteristic odour, and hot burning taste. They are used in essences, perfumery, etc, and include many varieties of compounds; as lemon oil is a terpene, oil of bitter almonds an aldehyde, oil of wintergreen an ethereal salt, etc.; called also volatile oils in distinction from the fixed or nonvolatile. Origin: Cf. F. Essentiel. See Essence. Source: Websters Dictionary (01 Mar 1998)
essential albuminuria	A collective term for types that are not the result of pathologic changes in the kidneys. Synonym: essential albuminuria. (05 Mar 2000)
essential amino acid	<biochemistry> Those amino acids that cannot be synthesised by an organism and must therefore be present in the diet. The term is often applied anthropocentrically to those amino acids required by humans (Ileu, Leu, Lys, Met, Phe, Thr, Try, & Val), though rats need two more (Arg & His). (18 Nov 1997)
essential amino acids	Alpha-amino acids nutritionally required by an organism and which must be supplied in its diet (i.e., cannot be synthesised by the organism) either as free amino acid or in proteins. (05 Mar 2000)
essential anaemia	An obsolete term for pernicious anaemia; also used formerly for any type of anaemia of unknown mechanism. (05 Mar 2000)
essential anisocoria	A common (20% of normals) benign inequality of the pupils that may change from one hour to the next. Synonym: essential anisocoria, physiologic anisocoria, simple-central anisocoria. (05 Mar 2000)
essential bradycardia	A slow pulse for which no cause can be discovered. Synonym: idiopathic bradycardia. (05 Mar 2000)
essential dysmenorrhoea	<gynaecology> Painful menses due to a functional disturbance and not due to organic factors such as growths, inflammation or anatomy. (27 Sep 1997)
essential fatty acid	<biochemistry> The three fatty acids required for growth in mammals, arachidonic, linolenic and linoleic acids. Only linoleic acid needs to be supplied in the diet, the other two can be made from it. (18 Nov 1997)
essential fever	Fever without known infectious disease. (05 Mar 2000)
essential food factors	Those substances required in the diet: certain amino acids and unsaturated fatty acids, vitamins, essential minerals, etc. (05 Mar 2000)