The Collaborative International Dictionary of English v.0.48:

Semitic \Sem*it"ic\, a.
   Of or pertaining to Shem or his descendants; belonging to
   that division of the Caucasian race which includes the Arabs,
   Jews, and related races. [Written also Shemitic.]
   [1913 Webster]

   Semitic language, a name used to designate a group of
      Asiatic and African languages, some living and some dead,
      namely: Hebrew and Ph[oe]nician, Aramaic, Assyrian,
      Arabic, Ethiopic (Geez and Ampharic). --Encyc. Brit.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shemitic \Shem*it"ic\, Shemitish \Shem"i*tish\, a.
   Of or pertaining to Shem, the son of Noah, or his
   descendants. See Semitic.
   [1913 Webster]