actinium

See also: Actinium

English

Chemical element
Ac	Previous: radium (Ra)
	Next: thorium (Th)

Etymology

actin- +‎ -ium

Pronunciation

• IPA^(key): /ækˈtɪniəm/

Noun

actinium (uncountable)

1. a radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores

Derived terms

Derived terms

• actinide
• actinium A
• actinium B
• actinium C
• actinium fluoride

• actinium series
• eka-actinium
• protactinium
• radioactinium

Related terms

→

• actinism
• actino-

• actinoid
• actinon

Translations

chemical element

• Afrikaans: aktinium (af)
• Albanian: aktin, aktinium m
• Arabic: أَكْتِينْيُوم‎ m (ʾaktinyum)
• Armenian: ակտինիում (hy) (aktinium)
• Asturian: actiniu m
• Azerbaijani: aktinium
• Basque: aktinioa
• Belarusian: актынiй m (aktynij)
• Breton: aktiniom (br)
• Bulgarian: актиний m (aktinij)
• Burmese: အက်တီနီယမ် (aktiniyam)
• Catalan: actini (ca) m
• Chinese:

  Mandarin: 錒 (zh), 锕 (zh) (ā)

• Cornish: actynyum
• Czech: aktinium (cs) n
• Danish: actinium (da)
• Dutch: actinium (nl) n
• Esperanto: aktinio (eo)
• Estonian: aktiinium (et)
• Faroese: actinium
• Finnish: aktinium (fi)
• French: actinium (fr) m
• Friulian: atini
• Galician: actinio (gl) m
• Georgian: აქტინიუმი (akṭiniumi)
• German: Actinium (de) n
• Greek: ακτίνιο (el) n (aktínio)
• Hebrew: אַקְטִינְיוּם‎ (he) m (aktínyum)
• Hindi: एक्टिनियम (ekṭiniyam), एजातु (ejātu)
• Hungarian: aktínium (hu)
• Icelandic: aktín (is)
• Irish: achtainiam m
• Italian: attinio (it) m
• Japanese: アクチニウム (ja) (akuchiniumu)
• Kashubian: aktin
• Kazakh: актиний (kk) (aktïnïy)
• Khmer: អាក់ទីញ៉ូម (ʾaktiiñoum)
• Korean: 악티늄 (ko) (aktinyum)
• Kyrgyz: актиний (aktiniy)

• Latin: actinium (la) n
• Latvian: aktīnijs
• Lithuanian: aktinis (lt)
• Luxembourgish: Aktinium
• Macedonian: актиниум m (aktinium)
• Malay: aktinium
• Maltese: aktinjum
• Manx: aghtinnium
• Mongolian: актини (mn) (aktini)
• Norwegian: actinium (no)
• Persian: اکتینیم‎ (fa) (aktiniyom)
• Polish: aktyn (pl) m
• Portuguese: actínio (pt) m
• Romanian: actiniu (ro) n
• Russian: акти́ний (ru) m (aktínij)
• Sanskrit: एजातु m (ejātu)
• Scottish Gaelic: aictiniam
• Serbo-Croatian:

  Cyrillic: актинијум m, актиниј m

  Roman: aktinijum m, aktinij (sh) m

• Slovak: aktínium (sk) n
• Slovene: aktinij (sl)
• Spanish: actinio (es) m
• Swedish: aktinium (sv) n
• Tajik: актиний (aktiniy)
• Tamil: அக்டினியம் (ta) (akṭiṉiyam)
• Thai: แอกทิเนียม (ɛ́k-tí-nîiam)
• Tibetan: ཨེག་ཊི་ནིམ (eg ṭi nim)
• Turkish: aktinyum (tr)
• Turkmen: aktiniý
• Ukrainian: актинiй m (aktynij)
• Urdu: عیکٹنیئم‎
• Uyghur: ئاكتىنىي‎ (aktiniy)
• Uzbek: aktiniy (uz)

  Cyrillic: актиний (uz)

• Vietnamese: actini
• Volapük: laktinin (vo)
• Welsh: actiniwm (cy)
• West Frisian: actinium

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Danish

Alternative forms

• aktinium

Noun

actinium

1. actinium

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Dutch

Chemical element
Ac	Previous: radium (Ra)
	Next: thorium (Th)

Pronunciation

• Audio

  (file)

Noun

actinium n (uncountable)

1. actinium

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French

Pronunciation

• IPA^(key): /ak.ti.njɔm/

Noun

actinium m (uncountable)

1. actinium

Further reading

• “actinium” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

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Latin

Etymology

From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”).

Pronunciation

• (Classical) IPA^(key): /akˈtiː.ni.um/, [akˈtiː.ni.ũ]
• (Ecclesiastical) IPA^(key): /akˈti.ni.um/, [akˈtiː.ni.um]

• Audio (ecclesiastical)

  (file)

Noun

actīnium n (genitive actīniī); second declension

1. actinium

Inflection

Second declension.

Case	Singular	Plural
Nominative	actīnium	actīnia
Genitive	actīniī	actīniōrum
Dative	actīniō	actīniīs
Accusative	actīnium	actīnia
Ablative	actīniō	actīniīs
Vocative	actīnium	actīnia