An angle between two plane surfaces
The upward slope of an aircraft's wing
The angle between pairs of chemical bonds separated by a third bond
Consisting of, relating to or contained between two plane surfaces.
dihedral angle
(of a kite or an aeroplane) Having wings that form a dihedral angle, especially when the angle between the upper sides is less than 180°.
Of wing pairs, inclined at an upward angle to each other.