essential

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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 periodicals archive ?
The paper then argues that causal independence bears in a similar way on an issue Nathan Salmon raises concerning Kripke's argument for the Essentiality of Origins.
We send the letter of essentiality to the state DOT's so the states can expedite the permits," said transportation management coordinator Steve Beck.
Running through the discussion, as in Doshi's paradigm of village form and quirkily through the colonnades of Le Corbusier's commercial precinct, was the essentiality not of style or dogma but of life itself.