Definitions for "Nonionizing radiation"
Radiation that carries enough energy to excite an atom or molecule, but not enough energy to remove an electron from the atom or molecule. See ionizing radiation.
Radiation of electromagnetic form which does not have a high enough energy level to ionize (i.e., remove electrons from) material with which it comes in contact. Examples of nonionizing radiation include lasers, microwaves, extremely low frequency (ELF) electromagnetic fields, infrared and ultraviolet light, ultrasound, etc.
Forms of radiation, eg., infrared, radio and microwaves.