The Anabaptists were a religious movement that began in the 16th century. They are best known for their rejection of infant baptism and their belief in adult baptism. The term Anabaptist is derived from the Greek word meaning 'to baptize again.' The most well-known Anabaptist SECT is the AMISH, who are known for their traditional lifestyle and plain dress. Another Anabaptist SECT is the Mennonites, who are known for their commitment to nonviolence and pacifism.