Sacramentarian

 A name given in the sixteenth century to those German reformers who rejected both the Roman and the Lutheran doctrine of the holy eucharist.  [1913 Webster]

 One who holds extreme opinions regarding the efficacy of sacraments.  [1913 Webster]

 Of or pertaining a sacrament, or to the sacramentals; sacramental.  [1913 Webster]

 Of or pertaining to the Sacramentarians.  [1913 Webster]