A fixed-wing aircraft is a heavier-than-air craft where movement of the wings in relation to the aircraft is not used to generate lift. The term is used to distinguish from rotary-wing aircraft or ornithopters, where the movement of the wing surfaces relative to the aircraft generates lift. Fixed-wing aircraft are called airplanes in North America (the U.S. and Canada), and aeroplanes in Commonwealth countries and Ireland (excluding Canada). These terms are derived from Greek αέρας (aéras-) ("air") and -plane. The current British word is the older of the two terms, dating back to the mid-late 19th century. Fixed-wing aircraft may be manned or not; they may be large or tiny; every fixed-wing aircraft is open to being scale modeled by perhaps a smaller or larger mimic fixed wing aircraft. Many fixed-wing aircraft may be remotely controlled or robot controlled.