A radioactive isotope of strontium; specifically strontium-90, which is a product of uranium fission and decays by beta emission with a half-life of about 29 years.
Origin
1940s; earliest use found in Science.
Definition of radiostrontium in US English:
radiostrontium
noun
A radioactive isotope of strontium; specifically strontium-90, which is a product of uranium fission and decays by beta emission with a half-life of about 29 years.