dihedral

[dahy-hee-druhl]

di·he·dral

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

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Dihedral is always a great word to know.
So is shear stress. Does it mean:
fractional volume change of a body due to uniform pressure
external force acting on an object or surface parallel to the slope or plane

Origin:
1790–1800; di-1 + -hedral
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
dihedral (daɪˈhiːdrəl)
 
adj
1.  having or formed by two intersecting planes; two-sided: a dihedral angle
 
n
2.  dihedron, Also called: dihedral angle the figure formed by two intersecting planes
3.  the US name for corner
4.  Compare anhedral the upward inclination of an aircraft wing in relation to the lateral axis

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
dihedral   (dī-hē'drəl)  Pronunciation Key 
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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