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)

2. (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.
3. (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) (lantʻan)
• Asturian: lantanu (ast) m
• Basque: lantanoa
• Belarusian: ланта́н m (lantán)
• Breton: lantan
• Bulgarian: ланта́н m (lantán)
• Catalan: lantani (ca) m
• Chinese:

  Mandarin: 鑭／镧 (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

Latin

Pronunciation

• (Classical) IPA^(key): /ˈlan.tʰa.num/, [ˈɫ̪än̪t̪ʰänʊ̃ˑ]
• (modern Italianate 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