Uniate

noun

Uni·​ate ˈyü-nē-ˌat  ˈü- 

variants or Uniat

: a Christian of a church adhering to an Eastern rite and discipline but submitting to papal authority

Uniate adjective

Word History

Etymology

Ukrainian uniat, uniyat one in favor of the union of the Greek and Roman Catholic churches, from uniya union, from Polish unija, from Late Latin unio — more at union

First Known Use

1833, in the meaning defined above