thorium

n. radioactive element (Chemistry)

Thorium (IPA: ) is a chemical element in the periodic table that has the symbol Th and atomic number 90. As a naturally occurring, slightly radioactive metal, it has been considered as an alternative nuclear fuel to uranium.
See more at Wikipedia.org...

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) Th, atomic number 90
(hypernym) metallic element, metal
(hyponym) thorium-228, radiothorium
(substance-holonym) monazite
(derivation) thoriate

n. thorium, radioactive element (Chemistry)

n. thorium, radioactive element (Chemistry)