Meanings
nounprotactinium (uncountable)
- uncountablechemistryA chemical element (symbol Pa) with atomic number 91. A dense, silvery-gray actinide metal.
- countablechemistryAn atom of this element.
Synonyms & antonyms
Similar
nouna short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
Similar
Broader
metallic elementmetal
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Proto-Indo-European*per-der.?
- Proto-Indo-European*pér
- Proto-Indo-European*pró
- Ancient Greekπρό (pró)
- Ancient Greekπρῶτος (prôtos)
- Ancient Greekπρωτο- (prōto-)
- Englishproto-
- Ancient Greekᾰ̓κτῑ́ς (ăktī́s)
- Frenchactino-
- Frenchactinium
- Englishactinium
- Englishprotactinium
Translations
Afrikaans protaktinium
- protaktiniumchemical element
Arabic بُرُوتَكْتِينِيُوم
- بُرُوتَكْتِينِيُوم (burūtaktīniyūm)chemical element
Basque protaktinioa
- protaktinioachemical element
Bulgarian протакти́ний
- протакти́ний (protaktínij)chemical element
Catalan protactini
- protactinichemical element
Chinese Mandarin 鏷 /镤
- 鏷 /镤 (pú)chemical element
Czech protaktinium
- protaktiniumchemical element
Danish protactinium
- protactiniumchemical element
Dutch protactinium
- protactiniumchemical element
Esperanto protaktinio
- protaktiniochemical element
Estonian protaktiinium
- protaktiiniumchemical element
Finnish protaktinium
- protaktiniumchemical element
French protactinium
- protactiniumchemical element
German Protactinium
- Protactiniumchemical element
Greek πρωτακτίνιο
- πρωτακτίνιο (protaktínio)chemical element
Hebrew פרוטקטיניום
- פרוטקטיניום (protaktínyum)chemical element
Hindi प्रैजातु
- प्रैजातु (praijātu)chemical element
Hungarian protaktínium
- protaktíniumchemical element
Icelandic protaktín
- protaktínchemical element
Irish prótachtainiam
- prótachtainiamchemical element
Italian protoattinio
- protoattiniochemical element
Japanese プロトアクチニウム
- プロトアクチニウム (purotoakuchiniumu)chemical element
Korean 프로트악티늄
- 프로트악티늄 (peuroteuaktinyum)chemical element
Latin protactinium
- protactiniumchemical element
Latvian protaktīnijs
- protaktīnijschemical element
Lithuanian protaktinis
- protaktinischemical element
Malay protaktinium
- protaktiniumchemical element
Norwegian protactinium
- protactiniumchemical element
Polish protaktyn
- protaktynchemical element
Portuguese protactínio
- protactíniochemical element
Romanian protactiniu
- protactiniuchemical element
Russian протакти́ний
- протакти́ний (protaktínij)chemical element
Scottish Gaelic pròtactainiam
- pròtactainiamchemical element
Slovak protaktínium
- protaktíniumchemical element
Spanish protactinio
- protactiniochemical element
Swedish protaktinium
- protaktiniumchemical element
Tamil புரொட்டக்டினியம்
- புரொட்டக்டினியம் (puroṭṭakṭiṉiyam)chemical element
Thai โพรแทกทิเนียม
- โพรแทกทิเนียม (proo-tɛ́k-tí-nîiam)chemical element
Turkish protaktinyum
- protaktinyumchemical element
Ukrainian протакти́ній
- протакти́ній (protaktýnij)chemical element
Vietnamese protactini
- protactinichemical element
Welsh protoactiniwm
- protoactiniwmchemical element
Cite this entry
APA
protactinium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/protactinium
MLA
“protactinium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/protactinium. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “protactinium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/protactinium.
Source: protactinium on Wiktionary, CC BY-SA 4.0.