sweepback

/ˈswipˌbæk/
noun
  1. The angle at which an aircraft's wing is set back from a straight line across the fuselage, usually to improve performance at high speeds.
    • Engineers increased the sweepback of the wings to reduce drag.
    • The fighter jet's sweepback allows it to fly faster and more efficiently.
    • Modern commercial airplanes often have a moderate sweepback for better fuel economy.
Synonyms
What does "sweepback" mean? | whatsthatwordmean | whatsthatwordmean