Full record for reaction drive n.

Definition a spaceship drive
OED requirements antedating 1949
Earliest cite T. Sturgeon 'Minority Report'
Comment Bill Seabrook located and Mike Christie confirmed a 1949 cite from Theodore Sturgeon's "Minority Report". (Earliest cite in the OED: 1957)
Last modified 6 July, 2008

Citations for reaction drive n.

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1949 T. Sturgeon in Astounding Sci. Fiction June 137/1 They fired up the reaction drive and began to move toward the sun.
1949 ‘T. Sturgeon’ in Astounding Sci. Fiction June 137/1 They fired up the reaction drive and began to move toward the sun.
1993 Sci. Fiction Age Jan. 42/2 Auxiliary systems, check. Prime reaction drive, check.