lanthanum

English
Chemical element
La
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Next: cerium (Ce)

Alternative forms

Etymology

From Ancient Greek λανθάνω (lanthánō, “to escape notice”) +‎ -um (“a chemical element”), because it had gone long undetected in mineral ores.

Pronunciation
  • enPR: lăn'thənəm, IPA(key): /ˈlænθənəm/
  • Audio (US)(file)

Noun

lanthanum (countable and uncountable, plural lanthanums)

  1. (uncountable) A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
  2. (countable) An atom of this element.

Synonyms

Derived terms
terms derived from lanthanum
  • lanthanum carbonate
  • lanthanum chloride
  • lanthanum glass
  • lanthanum nitrate
  • lanthanum oxide
  • lanthanum oxybromide
  • lanthanum sesquioxide
terms related to lanthanum

Translations

See also

Latin

Pronunciation
  • (Classical) IPA(key): /ˈlan.tʰa.num/, [ˈɫ̪än̪t̪ʰänʊ̃ˑ]
  • (Ecclesiastical) IPA(key): /ˈlan.ta.num/, [ˈlän̪t̪änum]

Noun

lanthanum n (genitive lanthanī); second declension

  1. lanthanum

Declension

Second-declension noun (neuter).

Case Singular Plural
Nominative lanthanum lanthana
Genitive lanthanī lanthanōrum
Dative lanthanō lanthanīs
Accusative lanthanum lanthana
Ablative lanthanō lanthanīs
Vocative lanthanum lanthana

Limburgish

Pronunciation
  • IPA(key): [lɑ˧nˈðaː˨nɔ˧m]

Noun

lanthanum n

  1. (uncountable) lanthanum
  2. A part of lanthanum

Inflection
Declension of lanthanum
Root singular Root plural Diminutive singular Diminutive plural
Nominative lanthanum lanthana lanthaneke lanthanekes
Genitive lanthanums lanthana lanthanekes lanthanekes
Locative lanthaneës lanthaneëser lanthaneëske lanthaneëskes
Dative¹ lanthanumme — lanthaneke —
Accusative¹ lanthanum — lanthaneke —
¹Dative and accusative are nowadays obsolete, the nominative is used instead.
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