Real Dictionary

Zwinglian in American English
of Zwingli or his doctrines, esp. the doctrine that the body of Christ is not actually present in the Eucharist and that the ceremony is merely a commemorative one
adjective: of or pertaining to Ulrich Zwingli or his religious doctrines, largely agreeing with those of Luther and offering a distinctive interpretation of the Lord's Supper
noun: a follower of Zwingli

Zwinglian in British English
adjective: of or relating to Zwingli, his religious movement, or his doctrines, esp his interpretation of the Eucharist
noun: an upholder of the religious doctrines or movement of Zwingli