Baha'i
noun
Ba·ha'i bä-ˈhä-ˌē 
-ˈhī,
bə-
plural Baha'is
: an adherent of a religious movement originating in Iran in the 19th century and emphasizing the spiritual unity of humankind
Baha'i adjective
Bahaism
bä-ˈhä-ˌi-zəm
noun -ˈhī-ˌi-
Bahaist
bä-ˈhä-(ˌ)ist
noun or adjective 
Word History
Etymology
Persian bahā'ī, literally, follower of Bahā' Allāh (from Arabic, splendor of God)
First Known Use
1889, in the meaning defined above