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

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
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