Francium

Pronunciation

• UK IPA: /ˈfɹansɪəm/, /ˈfɹɑːnsɪəm/
• US IPA: /ˈfɹænsiÉ™m/

Origin

From French francium, from France + -ium (after the native country of Marguerite Perey).

Full definition of francium

Noun

1. A metallic chemical element (symbol Fr) with an atomic number of 87.
• 2003, Bill Bryson, A Short History of Nearly Everything, BCA, p. 221:The most elusive element of all, however, appears to be francium, which is so rare that it is thought that our entire planet may contain, at any given moment, fewer than twenty francium atoms.

Synonyms

• actinium-K obsolete
• virginium obsolete

Derived terms

• eka-francium