A specially ordained or otherwise specially designated person who has the spiritual and liturgical rank of a bishop and who usually assists the Bishop of a diocese; some retired diocesan bishops become assistants to other bishops; some assistant bishops are specially ordained for their work. Assistant Bishops can perform most functions performed by other bishops.

An ordained person consecrated to become the next bishop of a diocese when the diocesan bishop retires; when the bishop retires or resigns, the Co-adjutor becomes the Diocesan and the term Co-adjutor is dropped. Suffragan bishops do not automatically become diocesan bishops.

The primary bishop of a diocese; sometimes referred to as "The Diocesan."

A working co-bishop in a diocese but without inherent right of succession when the diocesan bishop retires or resigns. Suffragan bishops are sometimes called by another diocese to become their Diocesan bishop.

A collection of prayers, readings, Psalms, devotions, and services used by the Episcopal Church; the worship book used by Episcopalians. Nearly all services in any Episcopal Church will be printed in this book.