suffragan
/ˈsʌfrəgən/(亦作 suffragan bishop或 bishop suffragan)
noun
1- a bishop appointed to help a diocesan bishop副主教。
1.1
- a bishop in relation to his archbishop or metropolitan隶属于大主教（或都主教）的主教。
词源
late Middle English: from Anglo-Norman French and Old French, representing medieval Latin suffraganeus 'assistant (bishop)', from Latin suffragium （see SUFFRAGE）.