The central point 
in polar coordinates, or the point with all
zero coordinates (0, ..., 0) in Cartesian coordinates.
In three dimensions, the x-axis, y-axis,
and z-axis meet at the origin.
Origin
See also
Octant, Quadrant, x-Axis, y-Axis, z-Axis Explore this topic in the MathWorld classroomExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Origin." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Origin.html