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vertical stabilizer

noun Aeronautics.
  1. the fixed vertical surface of an aircraft empennage, to which the rudder is hinged.
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Also called fin, vertical fin.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for vertical stabilizer

vertical stabilizer

noun
  1. the US name for fin 1 (def. 3a)
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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