francium
Pronunciation: fran′sē-ŭm
Definition: Radioactive element of the alkali metal series; atomic no. 87; half-life of most stable known isotope, 223Fr, is 21.8 min.
[France, native country of Marguerite Perey (1909–1975), the discoverer]
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Examples: glitazone, GI cocktail, etc.

