bremsstrahlung
Concise Oxford English Dictionary © 2008 Oxford University Press:
bremsstrahlung /ˈbrɛmzˌʃtrɑːlʊŋ/
▶noun Physics electromagnetic radiation emitted by a charged particle on passing through the electric and magnetic fields of a nucleus.
– origin 1940s: from Ger., from bremsen ‘to brake’ + Strahlung ‘radiation’.
'bremsstrahlung' also found in these Oxford entries:

