The Collaborative International Dictionary of English v.0.48:
Nodal \Nod"al\, a.
Of the nature of, or relating to, a node; as, a nodal point.
[1913 Webster]
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.
[1913 Webster]
The Free On-line Dictionary of Computing (30 December 2018):
NODAL
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.