Standard Lemma guide

lanthanoid

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • lăn'thənoid
  • /ˈlænθənɔɪd/

1

noun

Meaning 1

Synonym of lanthanide.

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: lanthanide

Antonyms: none provided

2

noun

Meaning 2

any element of the lanthanide series (atomic numbers 57 through 71)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: rare earth, rare-earth element, lanthanide, lanthanon

Antonyms: none provided

Broader terms: group, grouping

Narrower terms: terbium metal

History

Etymology

From lanthanum + -oid.