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VIFF

noun
  1. a technique used in flying VTOL aircraft to change direction suddenly by swivelling the jet engine nozzles
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Word Origin for VIFF

C20: v (ectoring) i (n) f (orward) f (light)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012