Po*lo"ni*um (?), n. [NL. So named after
Poland, in L. form Polonia, one of the discoverers being a
Pole.] (Chem.)
A supposed new element, a radioactive
substance discovered by M. and MMe. Curie in pitchblende. It is
closely related chemically to bismuth. It emits only alpha rays and is
perhaps identical with radium F.
© Webster 1913.