Adiaphorist /(ăd`ĭ*ăf"ō̇*rĭst)/

Ad·i·aph·o·rist

Adiaphorist

n.
  1. One of the German Protestants who, with Melanchthon, held some opinions and ceremonies to be indifferent or nonessential, which Luther condemned as sinful or heretical. (Eccl. Hist.)