Emily Dickinson Lexicon

A-DI-APH'OR-ISTS, n. [Gr. αδιαφορος, indifferent.]

Moderate Lutherans; a name given in the sixteenth century, to certain men that followed Melanchthon, who was more pacific than Luther. – Encyc. The Adiaphorists held some opinions and ceremonies to be indifferent, which Luther condemned as sinful or heretical.