Merriam-Webster Collegiate Dictionary - suffragan

 I. noun  Etymology: Middle English, from Anglo-French, from Medieval Latin ~eus, from suffragium support, prayer  Date: 14th century  1. a diocesan bishop (as in the Roman Catholic Church and the Church of England) subordinate to a metropolitan  2. an Anglican or Episcopal bishop assisting a diocesan bishop and not having the right of succession  II. adjective  Date: 15th century  1. of or being a ~  2. subordinate to a metropolitan or archiepiscopal see