The Collaborative International Dictionary of English v.0.48:

Tractarian \Trac*ta"ri*an\, n. (Ch. of England)
   One of the writers of the Oxford tracts, called "Tracts for
   the Times," issued during the period 1833-1841, in which
   series of papers the sacramental system and authority of the
   Church, and the value of tradition, were brought into
   prominence. Also, a member of the High Church party, holding
   generally the principles of the Tractarian writers; a
   Puseyite.
   [1913 Webster]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tractarian \Trac*ta"ri*an\, a.
   Of or pertaining to the Tractarians, or their principles.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Tractarian
    n 1: a follower of Tractarianism and supporter of the Oxford
         movement (which was expounded in pamphlets called `Tracts
         for the Times')