autorotation
Concise Oxford English Dictionary © 2008 Oxford University Press:
autorotation/ɔːtə(ʊ)rə(ʊ)ˈteɪʃ(ə)n/
▶noun rotation of an object caused by the flow of moving air or water around it.
– derivatives
autorotate verb.
autorotate verb.
'autorotation' also found in these Oxford entries:

