Essential disease
Essential Es*sen"tial ([e^]s*s[e^]n"sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster]

Majestic as the voice sometimes became, there was forever in it an essential character of plaintiveness. --Hawthorne. [1913 Webster]

2. Hence, really existing; existent. [1913 Webster]

Is it true, that thou art but a name, And no essential thing? --Webster (1623). [1913 Webster]

3. Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. [1913 Webster]

Judgment's more essential to a general Than courage. --Denham. [1913 Webster]

How to live? -- that is the essential question for us. --H. Spencer. [1913 Webster]

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.'' --Ford. [1913 Webster]

5. (Mus.) Necessary; indispensable; -- said of those tones which constitute a chord, in distinction from ornamental or passing tones. [1913 Webster]

6. (Med.) Idiopathic; independent of other diseases. [1913 Webster]

{Essential character} (Biol.), the prominent characteristics which serve to distinguish one genus, species, etc., from another.

{Essential disease}, {Essential fever} (Med.), one that is not dependent on another.

{Essential oils} (Chem.), a class of volatile oils, extracted from plants, fruits, or flowers, having each its characteristic odor, 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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Essential — Es*sen tial ([e^]s*s[e^]n sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster] Majestic as the voice sometimes became, there was forever in it an… …   The Collaborative International Dictionary of English

  • Essential character — Essential Es*sen tial ([e^]s*s[e^]n sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster] Majestic as the voice sometimes became, there was forever …   The Collaborative International Dictionary of English

  • Essential fever — Essential Es*sen tial ([e^]s*s[e^]n sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster] Majestic as the voice sometimes became, there was forever …   The Collaborative International Dictionary of English

  • Essential oils — Essential Es*sen tial ([e^]s*s[e^]n sjal), a. [Cf. F. essentiel. See {Essence}.] 1. Belonging to the essence, or that which makes an object, or class of objects, what it is. [1913 Webster] Majestic as the voice sometimes became, there was forever …   The Collaborative International Dictionary of English

  • Essential — As in essential hypertension. A hallowed term meaning "We don t know the cause." Synonymous with idiopathic. * * * 1. Necessary, indispensable, ( e.g., e. amino acid s, e. fatty acid s). 2. Characteristic of. 3. Determining. 4. Of… …   Medical dictionary

  • essential — I. adjective Date: 14th century 1. of, relating to, or constituting essence ; inherent 2. a. of the utmost importance ; basic, indispensable, necessary < an essential requirement for admission to college > b. being a substance that is …   New Collegiate Dictionary

  • Essential fatty acid — Essential fatty acids, or EFAs, are fatty acids that cannot be constructed within an organism from other components (generally all references are to humans) by any known chemical pathways; and therefore mustbe obtained from the diet. The term… …   Wikipedia

  • essential tremor — n a common usu. hereditary or familial disorder of movement that is characterized by uncontrolled trembling of the hands and often involuntary nodding of the head and tremulousness of the voice, that is exacerbated by anxiety and by activity,… …   Medical dictionary

  • Essential tremor — Infobox Disease Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD10|G|25|0|g|20 ICD9 = ICD9|333.1 ICDO = OMIM = 190300 OMIM mult = OMIM2|602134 | MedlinePlus = 000762 eMedicineSubj = neuro eMedicineTopic = 129 MeshID = D020329 Essential tremor… …   Wikipedia

  • disease — diseasedly, adv. diseasedness, n. /di zeez /, n., v., diseased, diseasing. n. 1. a disordered or incorrectly functioning organ, part, structure, or system of the body resulting from the effect of genetic or developmental errors, infection,… …   Universalium

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