atomic number 91
Noun 1. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead (synonym) protactinium, protoactinium, Pa (hypernym) metallic element, metal | ||||
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Atomic number 91 Definition from Language, Idioms & Slang Dictionaries & Glossaries
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atomic number 91
atomic number 91
n : a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead [syn: protactinium, protoactinium, pa]
atomic number 91
n : a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead [syn: protactinium, protoactinium, pa]