Autorotating is what you do in a helicopter when the engine stops.
I was taught in the services and there the term "autorotation" was used in relation to spin entry, also if you use the Trevor Thom books you will find HE uses the same term (Book1 page 188).
Interesting that you should talk about the falling leaf after your comments about fishtailing at low speeds. If you should do this (fishtail at too low a speed) the falling leaf is what you will end up with in most aircraft as you are going to opposite rudder by the time the aircraft has started autorotating (yes that term again) in the first direction - this is not of course the idea in the fishtail and as stated I would normally prefer to sideslip, but is good to have ALL manouvers in your armoury.
