Subsidiary /(?)/

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.

   They constituted a useful subsidiary testimony of another state of existence.

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.

pl. Subsidiaries

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