atomic number 90
Noun 1. 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 (synonym) thorium, Th (hypernym) metallic element, metal (hyponym) thorium-228, radiothorium (substance-holonym) monazite | ||||
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Atomic number 90 Definition from Language, Idioms & Slang Dictionaries & Glossaries
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atomic number 90
atomic number 90
n : 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 [syn: thorium, th]
atomic number 90
n : 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 [syn: thorium, th]