What is the meaning of protactinium?

noun

  • A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
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APAWordNet. (2010). protactinium. Retrieved September 20, 2026, from http://smartdefine.org/protactinium/definitions/1247681
ChicagoWordNet. 2010. "protactinium" http://smartdefine.org/protactinium/definitions/1247681 (accessed September 20, 2026).
HarvardWordNet 2010, protactinium, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/protactinium/definitions/1247681>.
MLAWordNet. "protactinium" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/protactinium/definitions/1247681>