 Synonyms and Antonyms of protactinium 
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| Synonyms, Thesaurus & Antonyms of 'protactinium' |
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1. (noun) protactinium, protoactinium, Pa, atomic number 91
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
Synonyms: daddy, atomic number 91, protactinium, dad, public address system, pappa, dada, pascal, protoactinium, papa, pop
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