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autorotation

[aw-toh-roh-tey-shuh n]

noun Aeronautics.

the condition of flight occurring when lift is derived solely from the action of air upon the unpowered rotor of a moving helicopter or autogiro.

Nearby words

  1. autoradiography,
  2. autoregulation,
  3. autoreinfection,
  4. autoreproduction,
  5. autorickshaw,
  6. autoroute,
  7. autosave,
  8. autoschediasm,
  9. autosensitization,
  10. autosepticemia

Origin of autorotation

First recorded in 1915–20; auto-1 + rotation
Related formsau·to·ro·ta·tion·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for autorotation

autorotation

noun

the continuous rotation of a body in an airflow, such as that of the rotor blades of a helicopter in an unpowered descent
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012