[Peter Bro10]

From Microsoft's "Bookshelf"...

flywheel

flywheel (flì´hwêl´, -wêl´) noun
1. A heavy-rimmed rotating wheel used to minimize variations in angular velocity and revolutions per minute, as in a machine subject to fluctuation in drive and load.
2. An analogous device, especially one used to regulate the speed of clockwork.

++++++

I'll go with #2 difinition... but I still don't know exactly what he means!!!!