brems·strah·lung (brěm'shträ'ləng) n. The electromagnetic radiation produced by a change in the velocity of an electrically charged subatomic particle, such as an electron, as when it collides with another object.
[German : Bremse, brake (from Middle Low German premse, from pramen, to press) + Strahlung, radiation (from strahlen, to radiate, from Strahl, ray, from Middle High German strāle, from Old High German strāla, arrow, stripe; see ster-2 in Indo-European roots).]