Roundheads, derisive name for the supporters of Parliament during the English civil war. The name, which originated c.1641, referred to the short haircuts worn by some of the Puritans in contrast to the fashionable long-haired wigs worn by many of the supporters of King Charles I, who were called Cavaliers.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.