definitions
• synonyms

# dihedral

[dahy-hee-druh l]
See more synonyms on Thesaurus.com
1. having or formed by two planes.
2. of or relating to a dihedron.
noun
1. 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 .css-1fxfie5{font-size:22px;}@media (max-width:768px){.css-1fxfie5{font-size:18px;margin:0 10px 10px 0;word-break:break-all;word-wrap:break-word;-webkit-hyphens:auto;-moz-hyphens:auto;-ms-hyphens:auto;hyphens:auto;line-height:22px;}}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."

Carpentry and Woodwork

Edwin W. Foster

British Dictionary definitions for dihedral

# dihedral

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