THORIUM-228

 I. (noun) 

Sense 1

Meaning:

Radioactive isotope of thorium with mass number 228

Synonyms:

radiothorium; thorium-228

Classified under:

Nouns denoting substances

Hypernyms ("thorium-228" is a kind of...):

atomic number 90; Th; thorium (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)

Credits