essential

[adj] - being or relating to or containing the essence of a plant etc 2. [adj] - absolutely necessary 3. [adj] - absolutely required and not to be used up or sacrificed 4. [adj] - basic and fundamental
Found on http://www.webdictionary.co.uk/definition.php?query=essential

Essential

• (a.) Hence, really existing; existent. • (a.) Belonging to the essence, or that which makes an object, or class of objects, what it is. • (a.) Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. • (a.) Necessary; indispensable; -- said of those tones which constitute a chord,...
Found on http://thinkexist.com/dictionary/meaning/essential/

essential

indispensable adjective absolutely necessary; vitally necessary; `essential tools and materials`; `funds essential to the completion of the project`; `an indispensable worker`
Found on https://www.encyclo.co.uk/local/20974

Essential

[biology] An essential part of an organism is something that the organism cannot continue to be alive or reproduce without. For instance, mitochondria are essential to most eukaryotic cells. Genes can also be considered with regards to their essentiality. Essentiality is an important property in the context of pathogens, since drugs acting ...
Found on http://en.wikipedia.org/wiki/Essential_(biology)

Essential

Es┬Ěsen'tial (ĕs*sĕn'sj a l) adjective [ Confer French essentiel . See Essence .] 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 essenti...
Found on http://www.encyclo.co.uk/webster/E/68

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. Importa...
Found on http://www.encyclo.co.uk/local/20973

Essential

1. Something that cannot be done without.
Found on http://www.encyclo.co.uk/local/22410

Essential

1. something that cannot be done without. 2. For the purposes of this weight loss glossary, required in the diet, because the body cannot make it. As in an essential amino acid or an essential fatty acid. 3. Idiopathic. As in essential hypertension. "Essential" is a hallowed term meaning "We don't know the cause."
Found on http://www.obesityhelp.com/content/wls_glossary.html

essential

absolutely necessary
Found on https://www.vocabulary.com/lists/1162879

Essential

Any one of a class of odoriferous, volatile liquids, Oil insoluble in water, which are obtained from plants to which they impart odors and other characteristic properties.
Found on http://www.winning-homebrew.com/brewing-terms.html

Essential

Essential: 1. Something that cannot be done without. 2. Required in the diet, because the body cannot make it. As in an essential amino acid or an essential fatty acid. 3. Idiopathic. As in essential hypertension. 'Essential' is a hallowed term meaning 'We don't know the cause.'
Found on http://www.medterms.com/script/main/art.asp?articlekey=3332

Essential

In music, the term essential is said of those tones which constitute a chord, in distinction from ornamental or passing tones.
Found on http://www.probertencyclopaedia.com/browse/VE.HTM

essential

of the greatest importance
Found on https://www.vocabulary.com/lists/1017047

essential

Type: Term Pronunciation: ĕ-sen′shăl Definitions: 1. Necessary, indispensable, (essential amino acids, essential fatty acids). 2. Characteristic of. 3. Determining. 4. Of unknown etiology. 5. Relating to an essence (essential oil). Synonyms: intrinsic
Found on http://www.medilexicon.com/medicaldictionary.php?t=30473
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