dihedral angle

plural dihedral angles

1. geometryThe angle between two planes.

   The remaining dihedral angles are the source of essentially all the interesting variability in protein conformation.

   1981, Jane S. Richardson, “The Anatomy and Taxonomy of Protein Structure”, in C. B. Afinson, John T. Edsall, Frederic M. Richards, editors, Advances in Protein Chemistry, volume 34, page 173

   2 more examples

   Any two dihedral angles are to one another as the angles contained by perpendiculars drawn as in the last proposition.

   1830, Pierce Morton, Geometry, Plane, Solid and Spherical, London: Baldwin and Cradock, page 136

   The significance of small dihedral angles is readily apparent in Fig. 6.20, where the shape of the intersection is shown for angles of 10° and 1°.

   2009, Reza Abbaschian, Lara Abbaschian, Robert E. Reed-Hill, Physical Metallurgy Principles, Cengage Learning, page 176