WordReference Random House Unabridged Dictionary of American English © 2026
au•to•ro•ta•tion
(ô′tō rō tā′shən),USA pronunciation n. [Aeron.]
au′to•ro•ta′tion•al, adj.
- Aeronauticsthe condition of flight occurring when lift is derived solely from the action of air upon the unpowered rotor of a moving helicopter or autogiro.
- auto-1 + rotation 1915–20
'autorotation' also found in these entries (note: many are not synonyms or translations):