flybrid
n.— «Nearly every F1 car will be a flybrid in 2009, as the race series tries to become more relevant to mass market trends. It’s also trying to convince potential fans it’s a “green” sport.…A flybrid is hybrid gasoline/flywheel system which stores kinetic energy in a rapidly spinning wheel (up to 64,000 r.p.m.) which is sealed in a vacuum to keep atmospheric friction—and therefore heat—to a minimum.» —“Auto talk” by Chris Vander Doelen Windsor Star (Ontario, Canada) July 7, 2008. (source: Double-Tongued Dictionary)