(physics) The angle of incidence beyond which light traveling through a medium experiences total internal reflection upon encountering a boundary with a less refractive medium.

(chemistry) In a chain of atoms A-B-C-D, the dihedral angle between the plane containing the atoms A,B,C and that containing B,C,D

plural of angle grinder

(geometry) The angle between two planes.

plural of minute of angle

plural of angle bisector

(geometry) A particular dihedral angle, the angle between two intersecting arcs on a sphere, measured by the angle between the planes containing the arcs.

(motors) The angle of rotation of a crankshaft measured from the position in which the piston is at its highest point known as top dead center (TDC).

(television, cinematography) A camera angle which is deliberately slanted to one side, sometimes used for dramatic effect to help portray unease, disorientation, frantic or desperate action, intoxication, madness, etc.

(geometry) The three-dimensional analog of an angle, equivalent to the area of that portion of the surface of a unit sphere that it subtends.