Math.
a system of coordinates for locating a point in space by its polar coordinates and its perpendicular distance to the polar plane.
[ 1930-35 ]
Math.
a system of coordinates for locating a point in space by its polar coordinates and its perpendicular distance to the polar plane.
[ 1930-35 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012