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radiogold/ra·dio·gold/ (ra´de-o-gold″) one of the radioactive isotopes of gold, particularly 198Au; see gold 198.
radioactive goldAny of the radionuclides of gold, the most commonly used of which is beta- and gamma-emitting 198Au, with a half-life of 2.7 days. It is used clinically as an implant for treating certain cancers; it was formerly popular for scintigraphy.
a radioisotope of gold, especially 198Au, which has a half-life of 2.7 days and emits gamma and beta radiation. See gold-198.