Protactinium

nounverified·updated May 18, 2026

a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

Framework senses

2 senses across 2 frameworks

Wordset Dictionary1 senseview framework →

§1: a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

Legacy lexicon import1 senseview framework →

§1 · legacy_primary: a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
DR-088 backfill from the noun definition column