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dive brake

noun Aeronautics.
  1. a flap deployed from the wings or fuselage of an aircraft, as a dive bomber or sailplane, that increases drag to permit a relatively steep angle of descent without a dangerous buildup in speed.
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Origin of dive brake

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for dive brake

dive brake

noun
  1. a flap or spoiler extended from the wings of a ground-attack aircraft for controlling a dive
  2. another name for air brake
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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