A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
English: protactinium, protoactinium, Pa, atomic number 91
Less certain link between this word and this sense.
protaktiniumBahasa Indonesia
Pa, atomic number 91, protactinium, protoactinium
Rare
#227,529 of the corpus · 0 per million words · 106 occurrences