Actinide
nounverified·updated May 18, 2026
any of a series of radioactive elements with atomic numbers 89 through 103
Framework senses
- §1
- any of a series of radioactive elements with atomic numbers 89 through 103
- §1 · legacy_primary
- any of a series of radioactive elements with atomic numbers 89 through 103DR-088 backfill from the noun definition column