wingspan

1. N-COUNT The wingspan of a bird, insect, or aeroplane is the distance from the end of one wing to the end of the other wing. (鳥、崑蟲或飛機的)翼展; 翼幅[usu sing, usu with supp]

...a glider with an 18-foot wingspan. ...一架翼幅爲18英尺的滑翔機。