The Collaborative International Dictionary of English v.0.48:

Anglo-Saxonism \An"glo-Sax"on*ism\, n.
   1. A characteristic of the Anglo-Saxon race; especially, a
      word or an idiom of the Anglo-Saxon tongue. --M. Arnold.
      [1913 Webster]

   2. The quality or sentiment of being Anglo-Saxon, or English
      in its ethnological sense.
      [1913 Webster]