The wing root is the part of the wing on a fixed-wing aircraft or winged-spaceship that is closest to the fuselage. On a simple monoplane configuration, this is usually easy to identify. On parasol wing or multiple boom aircraft, the wing may not have a clear root area.
Wing roots usually bear the highest bending forces in flight and during landing, and they often have fairings (often named "wing fillets") to reduce interference drag between the wing and the fuselage.
The opposite end of a wing from the wing root is the wing tip.
- Peppler, I.L.: From The Ground Up, page 9. Aviation Publishers Co. Limited, Ottawa Ontario, Twenty Seventh Revised Edition, 1996. ISBN 0-9690054-9-0