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Definition of Atomic number 90
1. Noun. A soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands.
Exact synonyms: Th, Thorium
Generic synonyms: Metal, Metallic Element
Specialized synonyms: Radiothorium, Thorium-228
Substance meronyms: Monazite, Thorite
Derivative terms: Thoriate
Generic synonyms: Metal, Metallic Element
Specialized synonyms: Radiothorium, Thorium-228
Substance meronyms: Monazite, Thorite
Derivative terms: Thoriate
Lexicographical Neighbors of Atomic Number 90
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