subsidiary; branch or subsidiary establishment
• (v. t.) Serving to aid or help; serving as a chapel of ease; tributary.
Suc·cur'sal adjective [ Confer French succursale . See Succor , noun & transitive verb ] Serving to aid or help; serving as a chapel of ease; tributary. [ R.] « Not a city was without its cathedral, surrounded by its succursal...
subsidiary, esp. noting a religious establishment that is dependent upon a principal one.