Like many of the more complicated words in English, anthropology and ethnography both come from words in Ancient Greek. Anthropology is a combination of the words anthropos meaning human and logos meaning discussion or conversation. Literally then it means a conversation about humanity.
A simplistic view might be Ethnography as the social history of non-Western peoples. (Although this Euro-centric approach of looking at 'the other' may still seem an inherently biased one).