dihedral adjective & noun. [dʌɪ'hi:dr(ǝ)l] L18.
[from DI-² + -HEDRAL.]
A. adjective.
1. Having or contained by two planes or plane faces (e.g. of a crystal). L18.

2. Having or being an angle made by aircraft wings with one another, esp. when less than 180 degrees. E20.
b. noun. A dihedral angle or inclination. E20.

[TahlilGaran] English Dictionary ▲