nonessential

/ˌnän-i-ˈsen(t)-shəl/

adjective

  1. not essential

  2. being a substance synthesized by the body in sufficient quantity to satisfy dietary needs

noun

  1. any of various amino acids that are required for normal health and growth, that can be synthesized within the body or derived in the body from essential amino acids, and that include alanine, asparagine, aspartic acid, cystine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine