Protactinium
[,prәutæk'tiniәm]
Definition
(noun.) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
Typed by Lisa--From WordNet
[,prәutæk'tiniәm]
(noun.) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
Typed by Lisa--From WordNet