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Related to strontium 89: 89Sr
a chemical element, atomic number 38, atomic weight 87.62, symbol Sr. (See Appendix 6.)
strontium 89 a radioactive isotope of strontium having a half-life of 50.55 days and decaying by beta emission. It is used in the form of the chloride as a radiation source in the palliative treatment of bone pain in patients with metastatic bone lesions.
stron·ti·um 89 (89Sr),(stron'shē-ŭm),
A radioactive strontium isotope; a β emitter with a half-life of 50.52 days; used as a tracer in research activities such as the study of strontium absorption by the body and of strontium incorporation in bone.