English
Detailed Synonyms for protoactinium in English
protoactinium:
protoactinium [the ~] noun
-
the protoactinium
– a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 1the atomic number 91; the protactinium; the protoactinium; the Pa– a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead 1