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

plural of spherical wedge

plural of spherical aberration

(geometry) The amount by which the sum of the three angles of a spherical triangle exceeds two right angles. The spherical excess is proportional to the area of the triangle.

(geometry, uncountable) The geometry of the 2-dimensional surface of a sphere;

(geometry) A portion of the surface of a sphere cut off by a plane.

(geometry) A volume of a sphere lying between two vertical planes through the centre of the sphere.

(geometry) A portion of the surface of a sphere cut off by two vertical planes through the centre of the sphere.

(mathematics) The solutions to Laplace's equation using spherical coordinates

(optics) A type of lens aberration which causes blurriness, particularly away from the centre of the lens.