The Collaborative International Dictionary of English v.0.48:

Masoretic \Mas`o*ret"ic\, Masoretical \Mas`o*ret"ic*al\, a. [Cf.
   F. massor['e]tique.]
   Of or relating to the Masora, or to its authors.
   [1913 Webster]

   Masoretic points and accents, the vowel points and accents
      of the Hebrew text of the Bible, of which the first
      mention is in the Masora. See vowel point.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Masoretic
    adj 1: of or relating to the Masorah