- having or formed by two planes.
- of or relating to a dihedron.
- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for dihedral
At this point in Book VI it is customary to introduce the dihedral angle.
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 word "dihedral" is from the Greek, di- meaning "two," and hedra meaning "seat."
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
- having or formed by two intersecting planes; two-sideda dihedral angle
- 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.