Promethium
nounverified·updated May 18, 2026
a soft silvery metallic element of the rare earth group having no stable isotope
Framework senses
- §1
- a soft silvery metallic element of the rare earth group having no stable isotope
- §1 · legacy_primary
- a soft silvery metallic element of the rare earth group having no stable isotopeDR-088 backfill from the noun definition column