ancillary
Definitions
Providing necessary support to the primary activities or operation of an organization, system, or institution.
Additional or supplementary in nature rather than primary or essential.
Examples
The company decided to sell its ancillary businesses to focus on its core products.
In addition to the main lecture, students are required to attend ancillary workshops.
The research provided only ancillary evidence that did not fully support the primary hypothesis.
Synonyms
auxiliary supplementary additional accessory subordinate supporting secondary