The Collaborative International Dictionary of English v.0.48:

Scotch rite \Scotch rite\ (Freemasonry)
   The ceremonial observed by one of the

   Masonic systems, called in full the Ancient and Accepted
      Scotch Rite; also, the system itself, which confers
      thirty-three degrees, of which the first three are nearly
      identical with those of the York rite.
      [Webster 1913 Suppl.]