Full record for gravs n.

Definition anti-gravitational propulsion devices
OED requirements antedating 1940
Earliest cite 'George Danzell', 'The Castaway'
Comment Fred Galvin submitted a 1942 cite from Nelson S. Bond's "The Ballad of Venus Nell". Fred Galvin submitted a cite from a 1949 reprint of Nelson S. Bond's (writing as George Danzell) "The Castaway" which Mike Christie verified in its 1940 first publication. Fred Galvin submitted a 1946 cite from Richard S. Shaver's "Earth Slaves to Space". Fred Galvin submitted a 1947 cite from Henry Hasse's "Trail of the Astrogar". Fred Galvin submitted a 1950 cite from James H. Schmitz's "The Truth About Cushgar".
Last modified 6 July, 2008