e/Thorium-230

Information
has gloss	eng: Thorium-230 (230Th) is a radioactive isotope of thorium which can be used to date corals and determine ocean current flux. Ionium was a name given early in the study of radioactive elements to the 230Th isotope produced in the decay chain of 238U before it was realized that ionium and thorium are chemically identical. The symbol Io was used for this supposed element. In the science fiction novel "Have Space Suit-Will Travel" by Robert A. Heinlein, there is a conversation between an alien race and humans and the half-life of thorium-230 (75,380 years) was used as a unit of time.
lexicalization	eng: Thorium-230
instance of	(noun) one of two or more atoms with the same atomic number but with different numbers of neutrons isotope

Meaning
Estonian
has gloss	est: Ioonium (sümbol Io) on tooriumi isotoop 230Th.
lexicalization	est: Ioonium
Russian
has gloss	rus: То́рий-230 , историческое название ио́ний (, обозначается символом Io) — радиоактивный нуклид химического элемента тория с атомным номером 90 и массовым числом 230. Открыт в 1906 году.
lexicalization	rus: Торий-230