noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Radon-220 (²²⁰₈₆Rn; symbol Tn), an isotope of radon uncountable
2. 2
   Alternative form of thorin (“C₁₆H₁₁AsN₂O₁₀S₂.₂Na”). alt-of, alternative, uncountable

Synonyms

All synonyms

exthoriothoreonthorinthorinthorium emanation

Etymology

Contraction of thorium emanation.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.