Dihedral

Di*he"dral

(?), a. [Gr. di- = di`s- twice + a seat, bottom, base, fr. to sit. Cf. Diedral.] 1. Having two plane faces; as, the dihedral summit of a crystal.
[1913 Webster]

2. Of a kite or an aroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180.
[Webster 1913 Suppl.]

3. (Aronautics) Of wing pairs, inclined at an upward angle to each other.
[Webster 1913 Suppl.]

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.
[1913 Webster]

 

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Tue 18th December 2018