francium Syllabification: (fran·ci·um)Pronunciation: /ˈfransēəm/Definition of francium noun the chemical element of atomic number 87, a radioactive member of the alkali metal group. Francium occurs naturally as a decay product in uranium and thorium ores. (Symbol: Fr)Origin: 1940s: from France (the discoverer's native country) + -iumfrancium in other Oxford dictionaries Definition of francium in the British & World English dictionary
