- Auxiliary or supplemental.
- Secondary or subordinate.
a subsidiary stream
1935, George Goodchild, chapter 5, in Death on the Centre Court:
- By one o'clock the place was choc-a-bloc. […] The restaurant was packed, and the promenade between the two main courts and the subsidiary courts was thronged with healthy-looking youngish people, drawn to the Mecca of tennis from all parts of the country.
- Of, or relating to a subsidy.
subsidiary payments to an ally
- Lord Mahon (1805-1875)
- George the Second relied on his subsidiary treaties.
auxiliary or supplemental
secondary or subordinate
subsidiary (plural subsidiaries)
- A company owned by a parent company or a holding company, also called daughter company or sister company.
- (music) A subordinate theme.
company owned by a parent company or a holding company
music: a subordinate theme