Definition of essential

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Essential (a.) Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil..

Lern More About Essential

Dualin :: Dualin (n.) An explosive substance consisting essentially of sawdust or wood pulp, saturated with nitroglycerin and other similar nitro compounds. It is inferior to dynamite, and is more liable to explosion..
Promorphology :: Promorphology (n.) Crystallography of organic forms; -- a division of morphology created by Haeckel. It is essentially stereometric, and relates to a mathematical conception of organic forms. See Tectology..
Substantive :: Substantive (a.) Pertaining to, or constituting, the essential part or principles; as, the law substantive..
Parallel :: Parallel (n.) Conformity continued through many particulars or in all essential points; resemblance; similarity.
Myricyl :: Myricyl (n.) A hypothetical radical regarded as the essential residue of myricin; -- called also melissyl.
Scapolite :: Scapolite (n.) A grayish white mineral occuring in tetragonal crystals and in cleavable masses. It is essentially a silicate of alumina and soda.
Opodeldoc :: Opodeldoc (n.) A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment..
Gratiolin :: Gratiolin (n.) One of the essential principles of the hedge hyssop (Gratiola officinalis).
Prerogative :: Prerogative (n.) An exclusive or peculiar privilege; prior and indefeasible right; fundamental and essential possession; -- used generally of an official and hereditary right which may be asserted without question, and for the exercise of which there is no responsibility or accountability as to the fact and the manner of its exercise..
Celluloid :: Celluloid (n.) A substance composed essentially of gun cotton and camphor, and when pure resembling ivory in texture and color, but variously colored to imitate coral, tortoise shell, amber, malachite, etc. It is used in the manufacture of jewelry and many small articles, as combs, brushes, collars, and cuffs; -- originally called xylonite..
Methyl :: Methyl (n.) A hydrocarbon radical, CH3, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether, methyl amine, etc..
Essential :: Essential (a.) Idiopathic; independent of other diseases.
Scale :: Scale (n.) The thin oxide which forms on the surface of iron forgings. It consists essentially of the magnetic oxide, Fe3O4. Also, a similar coating upon other metals..
Spermatozoid :: Spermatozoid (n.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoon. In plants the more usual term is antherozoid..
Roscoelite :: Roscoelite (n.) A green micaceous mineral occurring in minute scales. It is essentially a silicate of aluminia and potash containing vanadium.
Formyl :: Formyl (n.) A univalent radical, H.C:O, regarded as the essential residue of formic acid and aldehyde..
Tourniquet :: Tourniquet (n.) An instrument for arresting hemorrhage. It consists essentially of a pad or compress upon which pressure is made by a band which is tightened by a screw or other means.
Imitation :: Imitation (n.) One of the principal means of securing unity and consistency in polyphonic composition; the repetition of essentially the same melodic theme, phrase, or motive, on different degrees of pitch, by one or more of the other parts of voises. Cf. Canon..
Lifestring :: Lifestring (n.) A nerve, or string, that is imagined to be essential to life..
Fisetin :: Fisetin (n.) A yellow crystalline substance extracted from fustet, and regarded as its essential coloring principle; -- called also fisetic acid..
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