(geometry) An angle that, when added to another referenced angle, produces an angle of 180 degrees.

(geometry) Any angle that is not a right angle or multiple of right angles.

(not comparable, geometry) Having a right angle.

(anatomy) An area located on either side of the human back between the lateral borders of the erector spinae muscles and inferior borders of the twelfth rib, so called because the kidney can be felt at this location.

plural of central angle

(geometry) An angle positioned with its vertex at the center of a circle.

A usually hand-held grinder which uses a pair of internal gears to place the rotational axis of the grinding or cutting wheel perpendicular to that of the driving motor.

(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.

(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.