"subsidiary" in the noun sense
1. subordinate, subsidiary, underling, foot soldier
an assistant subject to the authority or control of another
2. subsidiary company, subsidiary
a company that is completely controlled by another company
"subsidiary" in the adjective sense
1. auxiliary, subsidiary, supplemental, supplementary
functioning in a supporting capacity
"the main library and its auxiliary branches"
Source: WordNet® (An amazing lexical database of English)
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