[1] : The Collaborative International Dictionary of English v.0.48

dihedral \dihe"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"eroplane, having wings that make with
      one another a dihedral angle, esp. when the angle between
      the upper sides is less than 180deg.
      webster 1913 suppl.

   3. a"eronautics 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
see also:
diedral dihedral angle 

Dihedral >> D Words
Dihedral, definition of term: Dihedral
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Dihedral Angle >> D Words
Dihedral Angle, definition of term: Dihedral Angle
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