Dictionary.net

• Of a kite or an aeroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180¡.

2010 - New Age Dictionary Database
By Oddity Software

• Of a kite or an aeroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180¡.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.