dispensable

1. (of a law, rule, vow, etc.) Subject to dispensation; possible to relax, exempt from, or annul.Examples: "Jones' use of the term 'Ecclesiastical Law' in his definition of dispensations in Roman Catholic canon law points to the Roman Catholic distinction between divine law, from which no dispensation is possible, and merely ecclesiastical law, which is dispensable in certain circumstances."Antonyms: indispensableusually

2. (biochemistry, nutrition, of an amino acid) Not essential to be taken in as part of an organism's diet, as it can be synthesized de novo.Examples: "The difference in absorption rate is not surprising since whey has a high percentage of indispensable amino acids, which are absorbed more rapidly than dispensable amino acids."Synonyms: nonessentialAntonyms: essential