# dihedral

dihedral
i. The positive acute angle between the lateral axis of an airplane and a line through the center of a wing or horizontal stabilizer. A dihedral is normally associated with a low-wing aircraft, although some dihedral angles may be incorporated into high-wing aircraft as well. A dihedral increases the lateral stability of an airplane.
ii. The angular difference between the chords of the wing and the tailplane. This is normally referred to as longitudinal dihedral.

Aviation dictionary. 2014.

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• Dihedral — or polyhedral may refer to: Dihedral angle, the angle between two mathematical planes Dihedral (aircraft), the upward angle of a fixed wing aircraft s wings where they meet at the fuselage, dihedral effect of an aircraft, longitudinal dihedral… …   Wikipedia

• dihedral — [dī hē′drəl] adj. [< DI 1 + Gr hedra, a seat, base + AL] 1. having or formed by two intersecting plane faces [a dihedral angle] 2. a) having wings that form a dihedral angle with each other, as some airplanes b) …   English World dictionary

• 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 a[ e]roplane, having wings that make with one another a …   The Collaborative International Dictionary of English

• dihedral — ► ADJECTIVE ▪ having or contained by two plane faces. ► NOUN 1) an angle formed by two plane faces. 2) Aeronautics upward inclination of an aircraft s wing …   English terms dictionary

• dihedral — /daɪˈhidrəl/ (say duy heedruhl) –adjective Mathematics 1. having, or formed by, two planes: a dihedral angle. 2. relating to or having a dihedral angle or angles. 3. (of an aircraft) having the wings sloping, especially upwards. Compare anhedral …

• dihedral — adj. & n. adj. having or contained by two plane faces. n. = dihedral angle. Phrases and idioms: dihedral angle an angle formed by two plane surfaces, esp. by an aircraft wing with the horizontal. Etymology: dihedron f. DI (1) + HEDRON …   Useful english dictionary

• dihedral — noun Date: circa 1911 1. dihedral angle 2. the angle between an aircraft supporting surface (as a wing) and a horizontal transverse line …   New Collegiate Dictionary

• dihedral — 1. noun a) An angle between two plane surfaces b) The upward slope of an aircrafts wing 2. adjective Consisting of, relating to or contained between two plane surfaces …   Wiktionary

• Dihedral (disambiguation) — Dihedral may refer to: *Dihedral the angle of a fixed wing aircraft s wings *Dihedral angle, is the angle between two planes, in geometry *Dihedral group, is the group of symmetries of the n sided polygon in abstract algebra **Also Dihedral… …   Wikipedia

• Dihedral angle — 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 a[ e]roplane, having wings that make with one… …   The Collaborative International Dictionary of English