He gave your co-ordinates and ordered Mullins to launch a missile.
They may be called (in a generalized sense) the co-ordinates of the lamina.
I understand you once knew ray-screens, co-ordinates and parabolics.
It is convenient to use these rather than Cartesian co-ordinates.
The body is the storm centre, the origin of co-ordinates, the constant place of stress in all that ...