From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
radiological dispersal device /ɹˌeɪdɪəlˈɒdʒɪkəl dɪspˈɜːsəl dɪvˈaɪs/ (RDD /ˌɑːdˌiːdˈiː/)
schmutzige Bombe, radiologische Dispersionsvorrichtung
Note: konventioneller Sprengsatz, der radioaktives Material verstreut
Synonym: dirty bomb
see: bomb, bombs, nuclear bomb, atomic bomb, germ bomb, photoflash bomb, firebomb, incendiary bomb, barrel bomb, aerial bomb, blind bomb, smart bomb, cobalt bomb, flare bomb, illuminating bomb, nail bomb, napalm bomb, neutron bomb, plutonium bomb, pipe bomb, robot bomb, buzz bomb, flying bomb, smart bomb, scatter bomb, fragmentation bomb, cluster bomb, dumb bomb, salted bomb, hydrogen bomb, fusion bomb, thermonuclear bomb, concussion bomb, unguided bomb, gravity bomb, unexploded bomb