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sweepback

[sweep-bak]
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noun Aeronautics.
  1. the shape of, or the angle formed by, an airplane wing or other airfoil the leading or trailing edge of which slopes backward from the fuselage.

Origin of sweepback

First recorded in 1915–20; noun use of verb phrase sweep back
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for sweepback

sweepback

noun
  1. the rearward inclination of a component or surface, such as an aircraft wing, fin, etc
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