francium Hear it!

francium Definition

fran·cium (fran′sē əm)

noun

a radioactive chemical element, an alkali metal, existing in minute amounts in nature as a decay product of actinium: symbol, Fr; at. no., 87

Etymology: ModL < France + -ium

francium Usage Examples

Modifies a noun

  • atom: Creating francium artificially has not been a problem; however, it has been a major challenge to trap francium atoms and study them.