Kata bahasa Indonesia
English word
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun thorium has 1 sense
- thorium(n = noun.substance) atomic number 90, th - 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; is a kind of metal, metallic element
has particulars: radiothorium, thorium-228
Derived form verb thoriate1
CIDE DICTIONARY
thorium, n. [NL. See Thorite.].
A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; -- formerly called also thorinum . Symbol Th. Atomic weight 232.0. [1913 Webster]
OXFORD DICTIONARY
thorium, n. Chem. a radioactive metallic element occurring naturally in monazite, the oxide of which is used in gas-mantles.
Usage
Symb.: Th.
Etymology
Thor, Scand. god of thunder