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1 definition found
 for Spherical coordinates
From The Collaborative International Dictionary of English v.0.48 :

  Coordinate \Co*["o]r"di*nate\, n.
     1. A thing of the same rank with another thing; one two or
        more persons or things of equal rank, authority, or
        importance.
        [1913 Webster]
  
              It has neither coordinate nor analogon; it is
              absolutely one.                       --Coleridge.
        [1913 Webster]
  
     2. pl. (Math.) Lines, or other elements of reference, by
        means of which the position of any point, as of a curve,
        is defined with respect to certain fixed lines, or planes,
        called coordinate axes and coordinate planes. See
        Abscissa.
  
     Note: Coordinates are of several kinds, consisting in some of
           the different cases, of the following elements, namely:
        (a) (Geom. of Two Dimensions) The abscissa and ordinate of
            any point, taken together; as the abscissa PY and
            ordinate PX of the point P (Fig. 2, referred to the
            coordinate axes AY and AX.
        (b) Any radius vector PA (Fig. 1), together with its angle
            of inclination to a fixed line, APX, by which any
            point A in the same plane is referred to that fixed
            line, and a fixed point in it, called the pole, P.
        (c) (Geom. of Three Dimensions) Any three lines, or
            distances, PB, PC, PD (Fig. 3), taken parallel to
            three coordinate axes, AX, AY, AZ, and measured from
            the corresponding coordinate fixed planes, YAZ, XAZ,
            XAY, to any point in space, P, whose position is
            thereby determined with respect to these planes and
            axes.
        (d) A radius vector, the angle which it makes with a fixed
            plane, and the angle which its projection on the plane
            makes with a fixed line line in the plane, by which
            means any point in space at the free extremity of the
            radius vector is referred to that fixed plane and
            fixed line, and a fixed point in that line, the pole
            of the radius vector.
            [1913 Webster]
  
     Cartesian coordinates. See under Cartesian.
  
     Geographical coordinates, the latitude and longitude of a
        place, by which its relative situation on the globe is
        known. The height of the above the sea level constitutes a
        third coordinate.
  
     Polar coordinates, coordinates made up of a radius vector
        and its angle of inclination to another line, or a line
        and plane; as those defined in
        (b) and
        (d) above.
  
     Rectangular coordinates, coordinates the axes of which
        intersect at right angles.
  
     Rectilinear coordinates, coordinates made up of right
        lines. Those defined in
        (a) and
        (c) above are called also Cartesian coordinates.
  
     Trigonometrical coordinates or Spherical coordinates,
        elements of reference, by means of which the position of a
        point on the surface of a sphere may be determined with
        respect to two great circles of the sphere.
  
     Trilinear coordinates, coordinates of a point in a plane,
        consisting of the three ratios which the three distances
        of the point from three fixed lines have one to another.
        [1913 Webster]

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