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Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
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.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: natural-sciences, physical-sciences, physics
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
radioactive isotope of thorium with mass number 228
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: radiothorium
Antonyms: none provided
Broader terms: thorium, Th, atomic number 90
History
No etymology was provided for this word.
