Definition: A radioactive element, atomic no. 84, isolated from pitchblende; the longest-lived isotope is 209Po (half-life 102 years); 210Po is radium F (half-life 138.38 days), the only readily accessible isotope.
[L. fr. Polonia, Poland, native country of Mme. M.S. Curie who with her husband, P. Curie, discovered the substance]
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Examples: glitazone, GI cocktail, etc.