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protactinium |
Grep of noun protactinium protactinium Overview of noun protactinium The noun protactinium has 1 sense (no senses from tagged texts) 1. protactinium, protoactinium, Pa atomic number 91 -- (a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead) Overview of noun protactinium The noun protactinium has 1 sense (no senses from tagged texts) 1. protactinium, protoactinium, Pa atomic number 91 -- (a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead)
protactinium definition
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