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) Audio (General American): (file)
Noun
lanthanum (countable and uncountable, plural lanthanums)
- (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.
- (countable) An atom of this element.
Synonyms
Derived terms
- dilanthanum
- lanthanian
- lanthanum carbonate
- lanthanum chloride
- lanthanum glass
- lanthanum nitrate
- lanthanum oxide
- lanthanum oxybromide
- lanthanum sesquioxide
- organolanthanum
- radiolanthanum
Related terms
Translations
metallic element
|
See also
- Fosrenol
- rare earth
Latin
Pronunciation
- (Classical Latin) IPA(key): [ˈɫan.tʰa.nũː]
- (modern Italianate Ecclesiastical) IPA(key): [ˈlan̪.t̪a.num]
Noun
lanthanum n (genitive lanthanī); second declension
Declension
Second-declension noun (neuter).
| 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