01 a. Having two plane faces; as, the dihedral summit of a crystal.
-
1.
Having two plane faces; as, the dihedral summit of a crystal.
-
2.
Of a kite or an aëroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180°.
-
3.
Of wing pairs, inclined at an upward angle to each other.(Aëronautics)
Phrases & compounds
Dihedral angle —
the angular space contained between planes which intersect. It is measured by the angle made by any two lines at right angles to the two planes.