Look up: dihedral

1. dihedral
   acute angle between left and right mainplanes or tailplanes and lateral axis Category: Transport • the angle at which,in an aeroplane or glider,the port and starboard parts of the main plane or tailplane are inclined upwards to the transverse plane of reference.If the inclination is down...
   Found on http://www.mijnwoordenboek.nl/definition
   
   
2. Dihedral
   Di·he'dral adjective [ Greek di- = di`s- twice + ... a seat, bottom, base, from ... to sit. Confer Diedral .] Having two plane faces; as, the dihedral summit of a crystal. Dihedral angle , the angular sp...
   Found on http://www.encyclo.co.uk/webster/D/65
   
   
3. Dihedral
   Di·he'dral adjective 1. 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°. 2. (Aëronautics) Of wing pairs, inclined at an upward angle to each other.
   Found on http://www.encyclo.co.uk/webster/D/65
   
   
4. Dihedral
   • (a.) Having two plane faces; as, the dihedral summit of a crystal. • (a.) Of wing pairs, inclined at an upward angle to each other. • (a.) Of a kite or an aeroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180
   Found on http://thinkexist.com/dictionary/meaning
   
   
5. Dihedral
   [aircraft] Dihedral angle is the upward angle from horizontal of the wings or tailplane of a fixed-wing aircraft. Anhedral angle is the name given to negative dihedral angle, that is, when there is a downward angle from horizontal of the wings or tailplane of a fixed-wing aircraft. Dihedral ...
   Found on http://en.wikipedia.org/wiki/Dihedral_(a
   
   
6. DIHEDRAL
   The acute angle, usually upward, between the wing of an airplane and a horizontal cross-section line. Opposite of ANHEDRAL.
   Found on http://www.aerofiles.com/glossary.html