1. [n]  a member of the Episcopal church
2. [adj]  (religion) of or pertaining to or characteristic of the Episcopal church; "the Episcopal hierarachy"; "married by an Episcopalian minister"

EPISCOPALIAN is a 12 letter word that starts with E.

1. \E*pis`co*pa"li*an\, a.
   Pertaining to bishops, or government by bishops; episcopal;
   specifically, of or relating to the Protestant Episcopal
   Church.
   
   

2. \E*pis`co*pa"li*an\, n.
   One who belongs to an episcopal church, or adheres to the
   episcopal form of church government and discipline; a
   churchman; specifically, in the United States, a member of
   the Protestant Episcopal Church.