n.
Pronunciation: -r ō - ' t ā -sh ə n
Function: noun
Date: 1918
: the turning of the rotor of an autogiro or a helicopter with the resulting lift caused solely by the aerodynamic forces induced by motion of the rotor along its flight path
– au · to · ro · tate \ - ' r ō - ˌ t ā t \ intransitive verb