# Dihedral

Dihedral
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 dihedral angle, esp. when the angle between the upper sides is less than 180[deg]. [Webster 1913 Suppl.]

3. (A["e]ronautics) 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]

The Collaborative International Dictionary of English. 2000.

### Look at other dictionaries:

• 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 — ► 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 — 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… …   Aviation 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