> as lemmas

1906 W. Turnbull in Sci. Amer. 211/1 Properly speaking, an aeroplane can only be one of the parts, and not the whole, of an aeronef; for aeroplanes are used in kites, in soaring machines, and in ærodynes, which is the term I wish to propose to denote aeroplane-supported machines, driven by mechanical power (i. e., by a prime mover). The Greek roots of aerodyne are obvious... The word aerodyne should be capable of international acceptance, and I would therefore suggest that in future the subdivisions of aeronef be: helicopter, orthopter, soaring machine, and aerodyne.

1981 Biogr. Mem. Fellows Royal Soc. 27 618 This was embodied in a major paper entitled ‘The application of the aerodynamic properties of three dimensional bodies to the stabilisation and control of aerodynes’ issued in September 1946.

1998 UFO Mag. Jan.–Feb. 58/1 Obviously, there are even more advanced aerodynes flying around today that American military intelligence agencies and others want people to believe are flying saucers.