lanthanide

Fetched 2026-10-26 (cache).

Synonyms: lanthanite, lanthanoid, lanthanides, xanthamide, lanthanoids, lanthanium, cantharide, lanthanic

Antonyms: lanthanite, lanthanoid, lanthanides, xanthamide, lanthanoids, lanthanium, cantharide, lanthanic

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|chemistry}} Any of the 15 [[rare earth]] [[element]]s from [[lanthanum]] to [[lutetium]] in the [[periodic table]]; because their [[outermost]] [[orbital]]s are not filled, they have very similar [[chemistry]]; below them are the [[actinide]]s.
2. {{lb|en|chemistry}} Any 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).
3. {{lb|en|chemistry|dated}} Any 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).

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.