The Collaborative International Dictionary of English v.0.48:

ethnocentrism \ethnocentrism\ n.
   1. belief in the superiority of one's own ethnic group.
      [WordNet sense 1]
      [WordNet 1.5]

   2. a tendency to evaluate other people, activities, cultures,
      etc. primarily from the perspective of one's own as being
      superior.
      [PJC]

WordNet (r) 3.0 (2006):

ethnocentrism
    n 1: belief in the superiority of one's own ethnic group