Meanings
nounlanthanide (plural lanthanides)
plural lanthanides
- chemistryAny of the 15 rare earth elements from lanthanum to lutetium in the periodic table; because their outermost orbitals are not filled, they have very similar chemistry; below them are the actinides.
- chemistryAny of the 14 rare earth elements from lanthanum to ytterbium (lutetium is excluded by some authors as it is a d-block rather than an f-block element).
- datedchemistryAny of the 14 rare earth elements from cerium to lutetium (lanthanum having been excluded because it was thought to be a d-block element in the past).
Synonyms & antonyms
Similar
nounany element of the lanthanide series (atomic numbers 57 through 71)
Similar
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Englishlanthanium
- Proto-Indo-European*dʰeh₁-
- Englishlanthanide
From lanthanium + -ide.
Full word history & related roots →Translations
Afrikaans lantanied
- lantaniedA subset of the rare-earth elements
Chinese Mandarin 鑭系元素 /镧系元素
- 鑭系元素 /镧系元素 (lánxì yuánsù)A subset of the rare-earth elements
Finnish lantanidi, lantanoidi
- lantanidiA subset of the rare-earth elements
- lantanoidiA subset of the rare-earth elements
French lanthanide
- lanthanideA subset of the rare-earth elements
German Lanthanoid
- LanthanoidA subset of the rare-earth elements
Greek λανθανίδιο
- λανθανίδιο (lanthanídio)A subset of the rare-earth elements
Hungarian lantanoida
- lantanoidaA subset of the rare-earth elements
Icelandic lanþaníð, lantaníð
- lanþaníðA subset of the rare-earth elements
- lantaníðA subset of the rare-earth elements
Italian lantanide
- lantanideA subset of the rare-earth elements
Japanese ランタノイド
- ランタノイド (rantanoido)A subset of the rare-earth elements
Romanian lantanidă
- lantanidăA subset of the rare-earth elements
Russian лантано́ид
- лантано́ид (lantanóid)A subset of the rare-earth elements
Spanish lantánido
- lantánidoA subset of the rare-earth elements
Turkish lantanit
- lantanitA subset of the rare-earth elements
Cite this entry
APA
lanthanide. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/lanthanide
MLA
“lanthanide.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lanthanide. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “lanthanide,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/lanthanide.
Source: lanthanide on Wiktionary, CC BY-SA 4.0.