noun
mathematics : any of the coordinates in space obtained by constructing in a plane a polar coordinate system and on a line perpendicular to the plane at the pole a linear coordinate system
noun
mathematics : any of the coordinates in space obtained by constructing in a plane a polar coordinate system and on a line perpendicular to the plane at the pole a linear coordinate system
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012