ancillary
adjective
[ anˈsɪləri ]
• providing necessary support to the primary activities or operation of an organization, system, etc.
• "ancillary staff"
ancillary
noun
• a person whose work provides necessary support to the primary activities of an organization, system, etc.
• "the employment of specialist teachers and ancillaries"
Origin:
mid 17th century: from Latin ancillaris, from ancilla ‘maidservant’.
