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