ultradrive

From ultra- +‎ drive.

ultradrive (plural ultradrives)

1. (science fiction) A spaceship drive capable of travelling faster than the speed of light.
   • 2008, Peter F. Hamilton, The Temporal Void, London: Macmillan, →ISBN, pages 358–359:

     Politically, the assistance Marius provided was subtle and invaluable, allowing Ethan to build alliances within the Council and among the Clerics of the Orchard Palace, propelling him to a position where he could put himself forward for election with a great deal of confidence. Included with that was the offer of ultradrives for the Pilgrimage ships, a gift that would generate a near-certain success.

• Jesse Sheidlower, editor (2001–2024), “ultradrive, n.”, in Historical Dictionary of Science Fiction.