A science that concerns itself with the division of human beings into races and their origin, distribution, relations, and characteristics.
The study of ethnic groups characterized by a common set of customs, beliefs, language, or cultural origin.
The study of the different races of mankind and their variations a branch of anthropology that deals mainly with cultural and social differences between groups and the problems, medical and otherwise, that arise from their particular ways of life.
The comparative study of cultures using ethnographic data.