Main Entry:

an·cil·lary

Pronunciation:

\ˈan(t)-sə-ˌler-ē, -ˌle-rē, especially British an-ˈsi-lə-rē\

Function:

adjective

Date:

1667

1 : subordinate, subsidiary <the main factory and its ancillary plants> 2 : auxiliary, supplementary <the need for ancillary evidence>

— ancillary noun