DIHEDRALS
- DIHEDRAL, the angle between two planes, also DIEDRAL [n]
- DIHEDRAL, a dihedron (a figure formed by two intersecting planes) [n]
- An angle formed by two plane faces
- Inclination of an aircraft's wing from the horizontal, esp. upward away from the fuselage
- A place where two planes of rock meet at an angle of between 60░ and 120░
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