Standard Lemma guide

cerium

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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  • sîr'ēəm
  • /ˈsɪəɹiəm/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -ɪəɹiəm

1

noun

Meaning 1

A chemical element (symbol Ce) with an atomic number of 58, a very soft, ductile, silvery-white metal that tarnishes when exposed to air.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Ce, atomic number 58

Antonyms: none provided

Broader terms: metallic element, metal

History

Etymology

From Ceres (“a famous asteroid”) + -ium. The element was discovered and named in 1803. It was named after the asteroid, which had been discovered recently (1801) and had been named after Ceres, the Roman goddess of agriculture. This was during an era when asteroids were culturally exciting things that humans were just beginning to understand properly in astronomical terms, and the era also featured a fascination with neoclassical themes and thus naming things after icons of ancient Greek and Roman mythology and literature.

Across languages

Translations

73 source translations are retained for this English entry.

  • Afrikaans: serium — chemical element
  • Albanian: cerium — chemical element
  • Arabic: سِيرِيُوم (sīriyūm) — chemical element
  • Arabic: كِيرِيُوم (kīriyūm) — chemical element
  • Armenian: ցերիում (cʻerium) — chemical element
  • Asturian: ceriu — chemical element
  • Basque: zerioa — chemical element
  • Belarusian: цэ́рый (céryj) — chemical element
  • Breton: seriom — chemical element
  • Bulgarian: це́рий (cérij) — chemical element
  • Catalan: ceri — chemical element
  • Chinese Mandarin: 鈰 /铈 (shì) — chemical element
  • Cornish: keryum — chemical element
  • Czech: cér — chemical element
  • Czech: cer — chemical element
  • Danish: cerium — chemical element
  • Dutch: cerium — chemical element
  • Esperanto: cerio — chemical element
  • Estonian: tseerium — chemical element
  • Faroese: serium — chemical element
  • Finnish: cerium — chemical element
  • French: cérium — chemical element
  • West-Frisian: cerium — chemical element
  • Friulian: ceri — chemical element
  • Galician: cerio — chemical element
  • Georgian: ცერიუმი (ceriumi) — chemical element
  • German: Cer — chemical element
  • Greek: δημήτριο (dimítrio) — chemical element
  • Hebrew: סריום (seryum) — chemical element
  • Hindi: पुष्कला (puṣkalā) — chemical element
  • Hungarian: cérium — chemical element
  • Icelandic: serín — chemical element
  • Irish: ceiriam — chemical element
  • Italian: cerio — chemical element
  • Japanese: セリウム (seriumu) — chemical element
  • Kashubian: cer — chemical element
  • Kazakh: церий (serii) — chemical element
  • Khmer: សេរ៉្យូម (seeryuum) — chemical element
  • Korean: 세륨 (seryum) — chemical element
  • Latin: cerium — chemical element
  • Latvian: cērijs — chemical element
  • Lithuanian: ceris — chemical element
  • Luxembourgish: Zer — chemical element
  • Macedonian: цериум (cerium) — chemical element
  • Malay: serium — chemical element
  • Maltese: sirjum — chemical element
  • Manx: kerrium — chemical element
  • Mongolian: цери (ceri) — chemical element
  • Norwegian: cerium — chemical element
  • Occitan: cèri — chemical element
  • Persian: سریم (seriom) — chemical element
  • Polish: cer — chemical element
  • Portuguese: cério — chemical element
  • Romanian: ceriu — chemical element
  • Russian: це́рий (cérij) — chemical element
  • Scottish Gaelic: ceiriam — chemical element
  • Serbo-Croatian: церијум — chemical element
  • Serbo-Croatian: cerij — chemical element
  • Serbo-Croatian: cerijum — chemical element
  • Slovak: cér — chemical element
  • Slovene: cerij — chemical element
  • Spanish: cerio — chemical element
  • Swedish: cerium — chemical element
  • Tajik: церий (ceriy) — chemical element
  • Thai: ซีเรียม (sii-rîiam) — chemical element
  • Turkish: seryum — chemical element
  • Ukrainian: це́рій (cérij) — chemical element
  • Uyghur: سېرىي (sëriy) — chemical element
  • Uzbek: церий — chemical element
  • Uzbek: tseriy — chemical element
  • Vietnamese: xeri — chemical element
  • Volapük: zerin — chemical element
  • Welsh: ceriwm — chemical element