http://www.britannica.com/blackhistory/article-234663
"The difference between racism and ethnocentrism
Although they are easily and often confused, race and racism must be distinguished from ethnicity and ethnocentrism. While extreme ethnocentrism may take the same offensive form and may have the same dire consequences as extreme racism, there are significant differences between the two concepts. Ethnicity, which relates to culturally contingent features, characterizes all human groups. It refers to a sense of identity and membership in a group that shares common language, cultural traits (values, beliefs, religion, food habits, customs, etc.), and a sense of a common history. All humans are members of some cultural (ethnic) group, sometimes more than one. Most such groups feel—to varying degrees of intensity—that their way of life, their foods, dress, habits, beliefs, values, and so forth, are superior to those of other groups.”...
http://www.britannica.com/EBchecked/topic/488187/racism
"racism, also called racialism , any action, practice, or belief that reflects the racial worldview—the ideology that humans are divided into separate and exclusive biological entities called "races," that there is a causal link between inherited physical traits and traits of personality, intellect, morality, and other cultural behavioral features, and that some races are innately superior to others.”...