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2017 Word of the Year

dihedral angle

noun, Geometry.
1.
the angle between two planes in a dihedron.
2.
Origin of dihedral angle
1820-1830
First recorded in 1820-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for dihedral angle
Historical Examples
  • At this point in Book VI it is customary to introduce the dihedral angle.

    The Teaching of Geometry David Eugene Smith
  • 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 reason is that the flexible covering will be bowed back by the wind, forming an approximate "dihedral angle."

    Carpentry and Woodwork

    Edwin W. Foster
  • 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

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Word Value for dihedral

13
13
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