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"We were essentially being shell-shocked by rapid change. That was one of the things you needed science-fiction writers for back in the Sixties, because we could cope with the future."
- Peter Watts

Gravity Drive  
  A spaceship propulsion method that uses gravity or gravity waves.  

First use of this phrase.

None of them had ever built a rocketship, had ever seen one in action even. It was centuries obsolete in Galactic civilization. But gravity drives were out of the question. So - they'd had to design the ship from the ground up.
From Star Ship, by Poul Anderson.
Published by Planet Stories in 1950
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