Standard Lemma guide

calcium

noun · 3 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • US: /ˈkælsi.əm/
  • US: Recorded audio is listed in the source snapshot.
  • South-Asia: /ˈkalʃɪəm/
  • Philippines: /ˈkæl.ʃum/
  • CMU ARPABET: K AE1 L S IY0 AH0 M Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The chemical element (symbol Ca) with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

An atom of this element.

Definition source: English Wiktionary via Wiktextract

Usage: countable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Ca, atomic number 20

Antonyms: none provided

Broader terms: metallic element, metal

Narrower terms: calcium ion, factor IV

History

Etymology

Etymology tree Latin calx Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English calcium Coined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium.

Across languages

Translations

106 source translations are retained for this English entry.

  • Afrikaans: kalsium — chemical element of atomic number 20
  • Albanian: kalcium — chemical element of atomic number 20
  • Arabic: كَلْسِيُوم (kalsiyūm) — chemical element of atomic number 20
  • Arabic: كَالْسِيُوم (kālsiyūm) — chemical element of atomic number 20
  • Arabic: كالسيوم (kālsyum) — chemical element of atomic number 20
  • Armenian: կալցիում (kalcʻium) — chemical element of atomic number 20
  • Asturian: calciu — chemical element of atomic number 20
  • Basque: kaltzio — chemical element of atomic number 20
  • Belarusian: ка́льцый (kálʹcyj) — chemical element of atomic number 20
  • Belarusian: вапень (vapień) — chemical element of atomic number 20
  • Breton: kalsiom — chemical element of atomic number 20
  • Breton: kalkiom — chemical element of atomic number 20
  • Bulgarian: ка́лций (kálcij) — chemical element of atomic number 20
  • Catalan: calci — chemical element of atomic number 20
  • Chinese Cantonese: 鈣 /钙 (koi3) — chemical element of atomic number 20
  • Chinese Mandarin: 鈣 /钙 (gài) — chemical element of atomic number 20
  • Cornish: calcyum — chemical element of atomic number 20
  • Corsican: calciu — chemical element of atomic number 20
  • Czech: vápník — chemical element of atomic number 20
  • Danish: kalcium — chemical element of atomic number 20
  • Danish: calcium — chemical element of atomic number 20
  • Dutch: calcium — chemical element of atomic number 20
  • Esperanto: kalcio — chemical element of atomic number 20
  • Estonian: kaltsium — chemical element of atomic number 20
  • Faroese: kalsium — chemical element of atomic number 20
  • Finnish: kalsium — chemical element of atomic number 20
  • French: calcium — chemical element of atomic number 20
  • West-Frisian: kalsium — chemical element of atomic number 20
  • Friulian: calci — chemical element of atomic number 20
  • Galician: calcio — chemical element of atomic number 20
  • Georgian: კალციუმი (ḳalciumi) — chemical element of atomic number 20
  • German: Kalzium — chemical element of atomic number 20
  • German: Calcium — chemical element of atomic number 20
  • Greek: ασβέστιο (asvéstio) — chemical element of atomic number 20
  • Hausa: alli — chemical element of atomic number 20
  • Hawaiian: puna — chemical element of atomic number 20
  • Hebrew: סידן (sidán) — chemical element of atomic number 20
  • Hebrew: קלציום (qáltzium) — chemical element of atomic number 20
  • Hindi: चूर्णातु (cūrṇātu) — chemical element of atomic number 20
  • Hungarian: kalcium — chemical element of atomic number 20
  • Icelandic: kalsín — chemical element of atomic number 20
  • Indonesian: kalsium — chemical element of atomic number 20
  • Indonesian: zat kapur — chemical element of atomic number 20
  • Interlingua: calcium — chemical element of atomic number 20
  • Inuktitut: ᓴᐅᓂᒃᓴᖅ (saoniksaq) — chemical element of atomic number 20
  • Irish: cailciam — chemical element of atomic number 20
  • Italian: calcio — chemical element of atomic number 20
  • Japanese: カルシウム (karushiumu) — chemical element of atomic number 20
  • Japanese: 石灰素 (sekkaiso) — chemical element of atomic number 20
  • Kashubian: kalcéń — chemical element of atomic number 20
  • Kazakh: кальций (kalsii) — chemical element of atomic number 20
  • Khmer: កាល់ស្យូម (kalsyoum) — chemical element of atomic number 20
  • Korean: 칼슘 (kalsyum) — chemical element of atomic number 20
  • Latin: calcium — chemical element of atomic number 20
  • Latvian: kalcijs — chemical element of atomic number 20
  • Lingala: kalisu class 9a/10a — chemical element of atomic number 20
  • Lithuanian: kalcis — chemical element of atomic number 20
  • Luxembourgish: Kalzium — chemical element of atomic number 20
  • Macedonian: калциум (kalcium) — chemical element of atomic number 20
  • Malagasy: diontsokay — chemical element of atomic number 20
  • Malay: kalsium — chemical element of atomic number 20
  • Malay: zat kapur — chemical element of atomic number 20
  • Malayalam: കാൽസ്യം (kālsyaṁ) — chemical element of atomic number 20
  • Maltese: kalċju — chemical element of atomic number 20
  • Manx: kelkium — chemical element of atomic number 20
  • Māori: konupūmā — chemical element of atomic number 20
  • Mongolian: кальци (kalʹci) — chemical element of atomic number 20
  • Mongolian: ᠺᠠᠯᠢᠼᠢ (kalici) — chemical element of atomic number 20
  • Mongolian: ᠺᠠᠯᠼ (kalc) — chemical element of atomic number 20
  • Navajo: káálsiiyin — chemical element of atomic number 20
  • Norwegian Bokmål: kalsium — chemical element of atomic number 20
  • Norwegian Nynorsk: kalsium — chemical element of atomic number 20
  • Occitan: calci — chemical element of atomic number 20
  • Persian: کلسیم (kalsiom) — chemical element of atomic number 20
  • Plautdietsch: Kaltsium — chemical element of atomic number 20
  • Pohnpeian: kalsium — chemical element of atomic number 20
  • Polish: wapń — chemical element of atomic number 20
  • Portuguese: cálcio — chemical element of atomic number 20
  • Romanian: calciu — chemical element of atomic number 20
  • Russian: ка́льций (kálʹcij) — chemical element of atomic number 20
  • Sanskrit: छौरेय (chaureya) — chemical element of atomic number 20
  • Santali: ᱠᱮᱞᱥᱤᱭᱟᱢ (kelsiyam) — chemical element of atomic number 20
  • Scottish Gaelic: cailceam — chemical element of atomic number 20
  • Serbo-Croatian: калциjум — chemical element of atomic number 20
  • Serbo-Croatian: калциj — chemical element of atomic number 20
  • Serbo-Croatian: kalcijum — chemical element of atomic number 20
  • Serbo-Croatian: kalcij — chemical element of atomic number 20
  • Slovak: vápnik — chemical element of atomic number 20
  • Slovene: kalcij — chemical element of atomic number 20
  • Spanish: calcio — chemical element of atomic number 20
  • Swahili: kalisiamu — chemical element of atomic number 20
  • Swedish: kalcium — chemical element of atomic number 20
  • Tagalog: kalsiyo — chemical element of atomic number 20
  • Tajik: калсий (kalsiy) — chemical element of atomic number 20
  • Tamil: சுண்ணியம் (cuṇṇiyam) — chemical element of atomic number 20
  • Tamil: கால்சியம் (kālciyam) — chemical element of atomic number 20
  • Telugu: సున్నము (sunnamu) — chemical element of atomic number 20
  • Thai: แคลเซียม (kɛɛl-sîiam) — chemical element of atomic number 20
  • Turkish: kalsiyum — chemical element of atomic number 20
  • Ukrainian: ка́льцій (kálʹcij) — chemical element of atomic number 20
  • Urdu: چورناتہ (cūrṇātu) — chemical element of atomic number 20
  • Uzbek: кальций (kal'tsiy) — chemical element of atomic number 20
  • Vietnamese: canxi — chemical element of atomic number 20
  • Volapük: kalsin — chemical element of atomic number 20
  • Welsh: calsiwm — chemical element of atomic number 20
  • Yiddish: קאַלציום (kaltsyum) — chemical element of atomic number 20
Real reading context

calcium in complete knowledge articles