What does "thorium-228" mean?

A radioactive isotope of thorium, ²²⁸₉₀Th, having a half-life of 1.9 years; it occurs naturally in small amounts, as member of the thorium-232 decay chain.

What is a synonym for "thorium-228"?

Common synonyms include: radiothorium.

Thorium-228

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A radioactive isotope of thorium, ²²⁸₉₀Th, having a half-life of 1.9 years; it occurs naturally in small amounts, as member of the thorium-232 decay chain. uncountable
2
radioactive isotope of thorium with mass number 228 wordnet

Synonyms

All synonyms

radiothorium

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