Subsidiary

Part of speech: noun (n.)

One who, or that which, contributes aid or additional supplies; an assistant; an auxiliary. Hammond.

Part of speech: adjective (a.)

1. Furnishing aid; assisting; auxiliary; helping; tributary; especially, aiding in an inferior position or capacity; as, a subsidiary stream. Chief ruler and principal head everywhere, not suffragant and subsidiary. Florio. They constituted a useful subsidiary testimony of another state of existence. Coleridge.

2. Of or pertaining to a subsidy; constituting a subsidy; being a part of, or of the nature of, a subsidy; as, subsidiary payments to an ally. George the Second relied on his subsidiary treaties. Ld. Mahon.