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dihedral

[dahy-hee-druh l]
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adjective
  1. having or formed by two planes.
  2. of or relating to a dihedron.
noun
  1. dihedron.
  2. 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

First recorded in 1790–1800; di-1 + -hedral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dihedral

Historical Examples

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

    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 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

  • The word "dihedral" is from the Greek, di- meaning "two," and hedra meaning "seat."

    The Teaching of Geometry

    David Eugene Smith

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


British Dictionary definitions for dihedral

dihedral

adjective
  1. having or formed by two intersecting planes; two-sideda dihedral angle
noun
  1. Also called: dihedron, dihedral angle the figure formed by two intersecting planes
  2. the US name for corner (def. 2)
  3. the upward inclination of an aircraft wing in relation to the lateral axisCompare 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

dihedral in Science

dihedral

[dī-hēdrəl]
  1. Formed by a pair of planes or sections of planes that intersect.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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