thorium
thorium · thoriums
торій
торий
Thorium
A chemical element with atomic number 90A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
/ˈθɔːɹiəm/
Meaning
2 senses(uncountable, usually)A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
Thorium
то́рийtórij
то́рійtórij
A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
(countable, usually)An atom of this element.
More definitions
- 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
Translations
9 languagesУкраїнська
By meaning 1
chemical element:
Русский
By meaning 1
chemical element:
Deutsch
By meaning 1
chemical element:
Forms
plural: thoriumsSynonyms
3 synonymsthorinum
Close in meaning
- 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:Thatomic number 90
Word family
20 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable