Meaning of nonrelativistic quantum mechanics

non'rel•a•tiv•is'tic quan'tum mechan'ics

Pronunciation: (non'rel-u-ti-vis'tik, non"-), [key]
— Physics. Physics.
  1. a form of quantum mechanics that excludes relativistic effects and is approximately applicable to low-energy problems, as the structure of atoms and molecules. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.