1) Aircraft configuration 2) French word used in English 3) Orthopter 1) Orthopter 
(or 'Thopter) Aircraft capable of sustained wing-beat flight in the manner of birds; one of the primary modes of transportation on the desert planet Arrakis.
An ornithopter (from Greek ornithos `bird` and pteron `wing`) is an aircraft that flies by flapping its wings. Designers seek to imitate the flapping-wing flight of birds, bats, and insects. Though machines may differ in form, they are usually built on the same scale as these flying creatures. Manned ornithopters have also been built, and some...
bird-like archaic flying machine
machine designed to fly by the flapping of its wings in imitation of birds. The wooden bird said to have been made about 400 by Archytas of Tarentum ... [3 related articles]
Edward Frost of Cambridgeshire, England, made an ornithopter of willow, silk, and feathers in 1902. Frost was later president of the Royal Aeronautical Society A flying machine that uses flapping wings. Leonardo da Vinci drew pictures of ornithopters in his famous sketchbooks, and several early-...
An aeroplane that flies by flapping its wings like a bird 
A flying machine that is supposed to support itself in the air through the use of flapping wings. 
A mechanically driven aerodyne whose lift in flight is obtained by the action of flapping wings.
a heavier-than-air craft designed to be propelled through the air by flapping wings.