The Collaborative International Dictionary of English v.0.48:

Sacramentarian \Sac`ra*men*ta"ri*an\, n. [LL. sacramentarius:
   cf. F. sacramentaire.]
   1. (Eccl.) 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]

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

The Collaborative International Dictionary of English v.0.48:

Sacramentarian \Sac`ra*men*ta"ri*an\, a.
   1. Of or pertaining a sacrament, or to the sacramentals;
      sacramental.
      [1913 Webster]

   2. Of or pertaining to the Sacramentarians.
      [1913 Webster]