n.
Pronunciation: ˌ o ̇ -t ō - ' r ā -d ē - ə - ˌ graf
Function: noun
Etymology: International Scientific Vocabulary
Date: 1903
: an image produced on a photographic film or plate by the radiations from a radioactive substance in an object which is in close contact with the emulsion
– au · to · ra · dio · graph · ic \ - ˌ r ā -d ē - ə - ' gra-fik \ adjective
– au · to · ra · di · og · ra · phy \ - ˌ r ā -d ē - ' ä-gr ə -f ē \ noun