actinium

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See also: Actinium

English

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Chemical element
Ac
Previous: radium (Ra)
Next: thorium (Th)
English Wikipedia has an article on:
Wikipedia
Some actinium-225, glowing due to its radioactivity. (The longest-lived isotope of actinium is actinium-227, not 225.)

Etymology

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Borrowed from French actinium. actin- +‎ -ium.

Pronunciation

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Noun

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actinium (usually uncountable, plural actiniums)

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

Derived terms

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Translations

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Danish

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Alternative forms

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Noun

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actinium

  1. actinium

Dutch

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Dutch Wikipedia has an article on:
Wikipedia nl
Chemical element
Ac
Previous: radium (Ra)
Next: thorium (Th)

Etymology

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Borrowed from French actinium.

Pronunciation

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  • IPA(key): /ɑkˈti.ni.ʏm/
  • Audio:(file)
  • Hyphenation: ac‧ti‧ni‧um

Noun

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actinium n (uncountable)

  1. actinium [from ca. 1900]
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French

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French Wikipedia has an article on:
Wikipedia fr

Pronunciation

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Noun

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actinium m (uncountable)

  1. actinium

Further reading

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Latin

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Latin Wikipedia has an article on:
Wikipedia la

Etymology

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

Pronunciation

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Noun

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actīnium n (genitive actīniī); second declension

  1. actinium

Declension

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Second-declension noun (neuter).

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

Norwegian Bokmål

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Chemical element
Ac
Previous: radium (Ra)
Next: thorium (Th)
Norwegian Bokmål Wikipedia has an article on:
Wikipedia nb
Electron shell diagram for Actinium, the 89th element in the periodic table of elements.

Etymology

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First part actin- from Ancient Greek ἀκτίς (aktís, ray, beam), from Proto-Hellenic [Term?], from Proto-Indo-European *nókʷ-t-u-s ~ *n̥kʷ-t-éw-s, from *nókʷts (night), from *negʷ- (bare, naked). Last part from Latin -ium (forms names of chemical elements), from -ius (forms adjectives), from Old Latin -iōs, from Proto-Italic *-jos (forms comparative adverbs), from Proto-Indo-European *-yōs ~ *-is- (forms adjectives).

Pronunciation

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  • IPA(key): /akˈtiːnɪʉm/
  • Audio:(file)
  • Rhymes: -ʉm
  • Hyphenation: ac‧ti‧ni‧um

Noun

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actinium n (definite singular actiniumet, indefinite plural actinium, definite plural actiniuma or actiniumene)

  1. (organic chemistry) actinium (a radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores)
    • 2015, periodesystemet.no:
      actinium får nitrogenet i luften til å lyse blått
      actinium causes the nitrogen in the air to glow blue

References

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