\Nod"al\, a. Of the nature of, or relating to, a node; as, a nodal point. {Nodal line}, {Nodal point}, in a vibrating plate or cord, that line or point which remains at rest while the other parts of the body are in a state of vibration.
Interpreted language implemented on Norsk Data's NORD-10 computers. Used by CERN and DESY high energy physics labs to control their accelerator hardware, PADAC and SEDAC. Included trackball input, graphics.