Math.
a system of coordinates for locating a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
[ 1860-65 ]
Math.
a system of coordinates for locating a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
[ 1860-65 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012