Full record for space gun n.

Definition a large gun which projects a spacecraft into space, or a hand-held gun whose recoil is used by an astronaut or spaceman to propel himself
OED requirements antedating 1932
Earliest cite Ray Cummings, 'Wandl the Invader'
Comment Fred Galvin submitted a 1932 cite from "Wandl the Invader" by Ray Cummings (though this may be a weapon rather than a propulsion device)

Earliest cite in the OED Is from 1935 (H.G. Wells, 'Things to Come')

Last modified 25 October, 2010