spherical coordinatespherical coordinate
Math. any of three coordinates for locating a point in three-dimensional space by reference to the length of its radius vector and the two polar angles that determine the position of this vector
Any of a set of coordinates in a three-dimensional system for locating points in space by means of a radius vector and two angles measured from the center of a sphere with respect to two arbitrary, fixed, perpendicular directions.
The spherical coordiantes of point P are (r, &phgr;, &thgr;).