Meanings
nounthorium (usually uncountable, plural thoriums)
plural thoriums
- uncountableusuallychemistryA chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.
- countableusuallychemistryAn atom of this element.
Synonyms & antonyms
Similar
nouna 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
Similar
Thatomic number 90
Broader
metallic elementmetal
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Translations
Afrikaans torium
- toriumchemical element
Arabic ثُورِيُوم
- ثُورِيُوم (ṯūriyūm)chemical element
Basque torioa
- torioachemical element
Bulgarian то́рий
- то́рий (tórij)chemical element
Catalan tori
- torichemical element
Chinese Mandarin 釷 /钍
- 釷 /钍 (tǔ)chemical element
Czech thorium
- thoriumchemical element
Danish thorium
- thoriumchemical element
Dutch thorium
- thoriumchemical element
Esperanto torio
- toriochemical element
Estonian toorium
- tooriumchemical element
Finnish torium
- toriumchemical element
French thorium
- thoriumchemical element
German Thorium
- Thoriumchemical element
Greek θόριο
- θόριο (thório)chemical element
Hebrew תוריום
- תוריום (tóryum)chemical element
Hindi ह्रसातु
- ह्रसातु (hrasātu)chemical element
Hungarian tórium
- tóriumchemical element
Icelandic þórín
- þórínchemical element
Irish tóiriam
- tóiriamchemical element
Italian torio
- toriochemical element
Japanese トリウム, 釷
- トリウム (toriumu)chemical element
- 釷chemical element
Korean 토륨
- 토륨 (toryum)chemical element
Latin thorium
- thoriumchemical element
Latvian torijs
- torijschemical element
Lithuanian toris
- torischemical element
Malay torium
- toriumchemical element
Norwegian Bokmål thorium
- thoriumchemical element
Polish tor
- torchemical element
Portuguese tório
- tóriochemical element
Romanian toriu
- toriuchemical element
Russian то́рий
- то́рий (tórij)chemical element
Scottish Gaelic tòiriam
- tòiriamchemical element
Slovak thorium
- thoriumchemical element
Spanish torio
- toriochemical element
Swedish torium
- toriumchemical element
Tamil தோரியம்
- தோரியம் (tōriyam)chemical element
Thai ทอเรียม
- ทอเรียม (tɔɔ-rîiam)chemical element
Turkish toryum
- toryumchemical element
Ukrainian то́рій
- то́рій (tórij)chemical element
Vietnamese thori
- thorichemical element
Welsh thoriwm
- thoriwmchemical element
Rhymes & wordplay
Rhymes with thorium
All rhymes →Cite this entry
APA
thorium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/thorium
MLA
“thorium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/thorium. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “thorium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/thorium.
Source: thorium on Wiktionary, CC BY-SA 4.0.