Ethnologist (noun)

1. A social scientist who studies the culture and customs of different ethnic groups.
2. A person who specializes in the study of the culture, customs, and social organization of different ethnic groups.

Origin:

From the greek words "ethnos" meaning "people, nation" and "logos" meaning "study".

Examples:

1. The ethnologist conducted extensive research on the customs and beliefs of the indigenous people.
2. The ethnologist's book on the cultural practices of the tribe was widely read.
3. An ethnologist might study the social organization of a particular ethnic group.
4. The ethnologist's research was focused on the traditional customs of the ethnic group.
5. Ethnologists often study the different languages and customs of ethnic groups.