Nonparticulate radiation and Roentgen ray

Nonparticulate radiation noun - Radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge.

Roentgen ray and nonparticulate radiation are semantically related. In some cases you can replace phrase "Roentgen ray" with "Nonparticulate radiation", this phrases are similar.

Roentgen ray noun - Electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target.

Nonparticulate radiation and roentgen ray are semantically related. You can use "Nonparticulate radiation" instead a noun phrase "Roentgen ray".