essential


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Related to essential: Essential oils, essential tremor

essential

1. Biochem (of an amino acid or a fatty acid) necessary for the normal growth of an organism but not synthesized by the organism and therefore required in the diet
2. derived from or relating to an extract of a plant, drug, etc.
3. Logic (of a property) guaranteed by the identity of the subject; necessary. Thus, if having the atomic number 79 is an essential property of gold, nothing can be gold unless it has that atomic number
4. Music denoting or relating to a note that belongs to the fundamental harmony of a chord or piece
5. Pathol (of a disease) having no obvious external cause
6. Geology (of a mineral constituent of a rock) necessary for defining the classification of a rock. Its absence alters the rock's name and classification
7. Music an essential note
References in classic literature ?
The somewhat dim coal fire has an essential Influence in producing the effect which I would describe.
Destitute of this essential support, it must resign its independence, and sink into the degraded condition of a province.
But it could not be less folly to abolish liberty, which is essential to political life, because it nourishes faction, than it would be to wish the annihilation of air, which is essential to animal life, because it imparts to fire its destructive agency.
If our expectation of advantage be tempered in this way, we may succeed in accomplishing the essential part of our schemes.
Thus it is essential that the correlated terms should be exactly designated; if there is a name existing, the statement will be easy; if not, it is doubtless our duty to construct names.
He is the man who watches the growth of the cable - a sailor's phrase which has all the force, precision, and imagery of technical language that, created by simple men with keen eyes for the real aspect of the things they see in their trade, achieves the just expression seizing upon the essential, which is the ambition of the artist in words.
If the caligraphy be Poe's, it is different in all essential respects from all the many specimens known to us, and strongly resembles that of the writer of the heading and dating of the manuscript, both of which the contributor of the poem acknowledges to have been recently added.
He had strong feelings of family attachment and family honour, without pride or weakness; he lived with the liberality of a man of fortune, without display; he judged for himself in everything essential, without defying public opinion in any point of worldly decorum.
In militar commanders and soldiers, vain-glory is an essential point; for as iron sharpens iron, so by glory, one courage sharpeneth another.
The case of Gridley is in no essential altered from one of actual occurrence, made public by a disinterested person who was professionally acquainted with the whole of the monstrous wrong from beginning to end.
Life meanwhile- real life, with its essential interests of health and sickness, toil and rest, and its intellectual interests in thought, science, poetry, music, love, friendship, hatred, and passions- went on as usual, independently of and apart from political friendship or enmity with Napoleon Bonaparte and from all the schemes of reconstruction.
The most thoroughgoing of all distinctions in literature, as in the other Fine Arts, is that between (1) Substance, the essential content and meaning of the work, and (2) Form, the manner in which it is expressed (including narrative structure, external style, in poetry verse-form, and many related matters).