lanthanum

English

Chemical element
La
Previous: barium (Ba)
Next: cerium (Ce)

Alternative forms

• lantanium (obsolete)
• lanthanium (obsolete)

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

• La

Derived terms

terms derived from lanthanum

• lanthanum carbonate
• lanthanum chloride
• lanthanum glass
• lanthanum nitrate
• lanthanum oxide
• lanthanum oxybromide
• lanthanum sesquioxide

Related terms

terms related to lanthanum

• lanthana
• lanthanate
• lanthanide
• lanthanite
• lanthanoid
• lanthanon

Translations

metallic element

• Afrikaans: lantaan (af)
• Albanian: lantan
• Arabic: لَنْثَانُوم‎ m (lanṯānum)
• Armenian: լանթան (hy) (lantʿan)
• Asturian: lantanu (ast) m
• Basque: lantanoa
• Belarusian: ланта́н m (lantán)
• Breton: lantan
• Bulgarian: ланта́н m (lantán)
• Catalan: lantani (ca) m
• Chinese:

  Mandarin: 鑭 (zh) (làn)

• Cornish: lanthanum
• Czech: lanthan (cs)
• Danish: lanthan (da)
• Dutch: lanthaan (nl) n, lanthanium (nl) n
• Esperanto: lantano (eo)
• Estonian: lantaan (et)
• Faroese: lantan n
• Finnish: lantaani (fi)
• French: lanthane (fr) m
• Friulian: lantani
• Galician: lantano (gl) m
• Georgian: ლანთანი (lantani)
• German: Lanthan (de) n
• Greek: λανθάνιο (el) n (lanthánio)
• Hebrew: לנתן‎ (he) (lantán)
• Hindi: सुजारला (sujārlā)
• Hungarian: lantán (hu)
• Icelandic: lanþan n
• Ido: lantano (io)
• Irish: lantainam
• Italian: lantanio (it) m
• Japanese: ランタン (ja) (rantan)
• Kashubian: lantón
• Kazakh: лантан (kk) (lantan)
• Khmer: ឡង់តាន (lɑngtaan)
• Korean: 란탄 (ko) (rantan), 란타늄 (rantanyum), 란타넘 (rantaneom)
• Latin: lanthanum (la)
• Latvian: lantāns
• Lithuanian: lantanas (lt)
• Luxembourgish: Lanthan
• Macedonian: ланта́н m (lantán)
• Malay: lantanum
• Maltese: lantanum
• Manx: lantanum
• Mongolian: лантан (mn) (lantan)
• Norwegian: lantan
• Occitan: lantani m
• Polish: lantan (pl) m
• Portuguese: lantânio (pt) m
• Romanian: lantan (ro) n
• Russian: ланта́н (ru) m (lantán)
• Scottish Gaelic: lantanam
• Serbo-Croatian:

  Cyrillic: лантан m

  Roman: lantan m

• Slovak: lantán m
• Slovene: lantan (sl)
• Spanish: lantano (es) m
• Swedish: lantan (sv)
• Tagalog: lantano
• Tajik: lantan
• Tamil: மாய்மம் (māymam)
• Thai: แลนทานัม (lɛɛn-taa-nâm)
• Turkish: lantan (tr)
• Ukrainian: ланта́н m (lantán)
• Uzbek: lantan (uz), лантан (uz) (lantan)
• Vietnamese: lantan
• Volapük: lantanin (vo)
• Welsh: lanthanwm
• West Frisian: lanthaan

See also

• Fosrenol
• rare earth

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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

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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.