essentiality

[uh-sen-shee-al-i-tee]
noun, plural essentialities for 2.
1.
the quality of being essential; essential character.
2.
an essential feature, element, or point.

Origin:
1610–20; essential + -ity

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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essential (ɪˈsɛnʃəl)
 
adj
1.  vitally important; absolutely necessary
2.  basic; fundamental: the essential feature
3.  completely realized; absolute; perfect: essential beauty
4.  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
5.  derived from or relating to an extract of a plant, drug, etc: an essential oil
6.  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
7.  music denoting or relating to a note that belongs to the fundamental harmony of a chord or piece
8.  pathol (of a disease) having no obvious external cause: essential hypertension
9.  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
 
n
10.  something fundamental or indispensable: a sharp eye is an essential for a printer
11.  music an essential note
 
essentiality
 
n
 
es'sentialness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
It's intent is to help increase awareness of the essentiality of vitamins and other micronutrients.
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