nonessential

adjective

1. not essential; not necessary: Nonessential use of gasoline was forbidden during the war.

noun

2. a nonessential thing or person.

adjective

1. not essential; not necessary
2. biochem (of an amino acid in a particular organism) able to be synthesized from other substances

noun

3. a nonessential person or thing

adj.

1. Being a substance required for normal functioning but not needed in the diet because the body can synthesize it.