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.