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dihedral

[dahy-hee-druh l] /daɪˈhi drəl/
adjective
1.
having or formed by two planes.
2.
of or relating to a dihedron.
noun
3.
4.
Aeronautics. the angle at which the right and left wings or the halves of any other horizontal surface of an airplane or the like are inclined upward or downward.
Origin of dihedral
1790-1800
1790-1800; di-1 + -hedral
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for dihedral
Historical Examples
  • The "upturned tip" dihedral certainly appears to have the advantage.

  • At this point in Book VI it is customary to introduce the dihedral angle.

    The Teaching of Geometry David Eugene Smith
  • The word "dihedral" is from the Greek, di- meaning "two," and hedra meaning "seat."

    The Teaching of Geometry David Eugene Smith
  • It is a monoplane of the dihedral type, with a main plane on each side of the center.

    Flying Machines W.J. Jackman and Thos. H. Russell
  • The crystals of citric acid are oblique prisms with four faces, terminated by dihedral summits, inclined at acute angles.

  • The reason is that the flexible covering will be bowed back by the wind, forming an approximate "dihedral angle."

    Carpentry and Woodwork Edwin W. Foster
  • This feature is still to be found in many aeroplanes to-day and has come to be known as the 'dihedral.'

    A History of Aeronautics E. Charles Vivian
  • The locus of a point equidistant from the faces of a dihedral angle is the plane bisecting the angle.

    The Teaching of Geometry David Eugene Smith
  • In determining the center of gravity, the bird was frozen in the soaring position, its wings making a dihedral angle of 150.

    Langley Memoir on Mechanical Flight, Parts I and II S. P. (Samuel Pierpont) Langley and Charles M. (Charles Matthews) Manly
British Dictionary definitions for dihedral

dihedral

/daɪˈhiːdrəl/
adjective
1.
having or formed by two intersecting planes; two-sided: a dihedral angle
noun
2.
Also called dihedron, dihedral angle. the figure formed by two intersecting planes
3.
the US name for corner (sense 2)
4.
the upward inclination of an aircraft wing in relation to the lateral axis Compare anhedral
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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dihedral in Science
dihedral
  (dī-hē'drəl)   
Formed by a pair of planes or sections of planes that intersect.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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