subsidiary
1. sub.sid.iary \s*b-'sid-e--.er-e-, -'sid-*-re-\ aj [L subsidiarius, fr. subsidium reserve troops] 1a: furnishing aid or support : AUXILIARY 1b: of secondary importance : TRIBUTARY 2: of, relating to, or constituting a subsidy 2. subsidiary n : one that is subsidiary; esp : a company wholly controlled by ano ther