ethnic group

Definition of ethnic group
National Cancer Institute

ethnic group

(ETH-nik groop)
A group of people who share a similar culture (beliefs, values, and behaviors), language, religion, ancestry, or other characteristic that is often handed down from one generation to the next. They may come from the same country or live together in the same area. Examples of ethnic groups include Hispanics and Han Chinese. Some diseases or genetic conditions may be more common in certain ethnic groups than in others.

Source: NCI Dictionary of Cancer Terms