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[non-uh-sen-shuh l] /ˌnɒn əˈsɛn ʃəl/

not ; not necessary:
Nonessential use of gasoline was forbidden during the war.
a nonessential thing or person.
not essential; not necessary
(biochem) (of an amino acid in a particular organism) able to be synthesized from other substances
a nonessential person or thing

also nonessential, 1717, from non- + essential (adj.). Attested as a noun from 1806.

nonessential non·es·sen·tial (nŏn’ĭ-sěn’shəl)
Being a substance required for normal functioning but not needed in the diet because the body can synthesize it.


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  • Nonessential amino acid

    nonessential amino acid n. An alpha-amino acid that is required for protein synthesis and can be synthesized by humans.

  • Non-est

    [non est] /ˈnɒn ˈɛst/ noun, Law. 1. the returning of a sheriff’s writ when the person to be arrested or served with it cannot be found in the sheriff’s jurisdiction.

  • Nonesuch

    [nuhn-suhch] /ˈnʌnˌsʌtʃ/ noun 1. a person or thing without equal; paragon. /ˈnʌnˌsʌtʃ/ noun 1. (archaic) a matchless person or thing; nonpareil 2. another name for black medick see nonsuch.

  • Nonet

    [noh-net] /noʊˈnɛt/ noun, Music. 1. a group of nine performers or instruments. 2. a composition for a nonet. /nɒˈnɛt/ noun 1. a piece of music composed for a group of nine instruments 2. an instrumental group of nine players “composition for nine instruments,” 1865, from Italian nonetto, from nono “ninth,” from Latin nonus (see nones).

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