The term "nomad" is derived from the Greek word "nomas", meaning "to rove or wander." It refers to a lifestyle characterized by constantly moving from one place to another, typically with the seasons or in search of resources such as water, food, or grazing land. Nomadic societies are often associated with pastoralism, where they travel with herds of animals and live in portable shelters such as tents or yurts. Nomadism has been practiced by various cultures and societies throughout history and is still prevalent in some regions today, such as the Mongolian Steppes, parts of Africa, and the Middle East.