from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Mathematics Formed by or having two plane faces; two-sided.
- adj. Mathematics Relating to, having, or forming a dihedral angle.
- n. Mathematics A dihedral angle.
- n. Mathematics A dihedral group.
- n. Aeronautics The upward or downward inclination of an aircraft wing from true horizontal.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An angle between two plane surfaces
- n. The upward slope of an aircraft's wing
- n. The angle between pairs of chemical bonds separated by a third bond
- adj. Consisting of, relating to or contained between two plane surfaces.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having two plane faces.
- adj. Of a kite or an aëroplane, having wings that make with one another a dihedral angle, esp. when the angle between the upper sides is less than 180°.
- adj. Of wing pairs, inclined at an upward angle to each other.
from The Century Dictionary and Cyclopedia
- Having two sides, as a figure; having two plane faces, as a crystal.
- n. In geometry, a pair of consecutive faces of an angloid.
Sorry, no etymologies found.
Swedish manufacturer Koenigsegg is also taking door design to a new level with what it calls the dihedral synchro-helix actuation system.
The angle between two planes is termed dihedral, between three trihedral, between any number more than three polyhedral.
The silhouettes of eagles flatten out, while the wings of vultures show a dihedral curve (bird guides love throwing in words such as "dihedral," forcing you to not only look up birds but words as well).
But I also climbed -- well, I kind of built myself a rainbow, because I decided I was being wimpy, and I think that was about a 5.7, and I also did two 5. 8s on the slab and a tricky psych-out of a 5.8 in the dihedral under and over the barrel vault, which I had also done before.
Goldens soar with a slight dihedral; bald eagles soar with their wings almost flat.
Its wings are raised in a shallow, dihedral V, and its body tilts unevenly from one side to the other.
Then I went back to retry a tough white 5.7 in a dihedral with a little roof, and I blew it at the crux four times.
Not too complicated, a dihedral ray sent through a newform tesla coil – energy through copper or other alloy compound pyramid, base at edge of tesla coil point, point of pyramid to your point of aim.. charged dihedral ray point of ignition in atmoshere..you guess charge and combustion or action phase.
Thoughts on "flight dynamics twist, dihedral and wingtips"
All this talk of anhedral and dihedral leads to the question of why one would want use either of these on an aircraft.