Thorium — synonyms, definition
1. thorium (Noun)
2 synonyms
Th atomic number 90
1 definition
thorium (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.
2 types of
metal metallic element
2 types
radiothorium thorium-228
2 parts of
monazite thorite