calcium

/ˈkælsi.əm/

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South Asia/ˈkalʃɪəm/

calcium noun: 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.

Image: de:Benutzer:Tomihahndorf, CC BY-SA 3.0, via Wikimedia Commons

Noun

calcium (countable and uncountable, plural calciums)

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.
- Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of...2013 September-October, Katie L. Burke, “In the News”, in American Scientist, archived from the original on 30 Nov 2014
- “This material has a specific hardness and is chemically very stable. It forms naturally from calcium alone, but bacteria accelerate the transformation into calcium carbonate,” explains Alejandro Montesinos, head of the Decarbonization, Climate Change, and Circular Economy Research Group at Tec de...2024 August 6, Ricardo Treviño, “Self-Healing Concrete Help Buildings Seal Themselves”, in TecScience, archived from the original on 19 Jan 2025
(countable) An atom of this element.

calcium meaning in Hindi, Tamil, Urdu and Bengali

calcium in Hindi

chemical element of atomic number 20: चूर्णातु cūrṇātu

calcium in Tamil

chemical element of atomic number 20: சுண்ணியம் cuṇṇiyam, கால்சியம் kālciyam

calcium in Urdu

chemical element of atomic number 20: چورناتہ cūrṇātu

calcium in Bengali

ক্যালসিয়াম, খটিকা, চুণ

More languagesFewer languages

calcium in Telugu: సున్నము sunnamu
calcium in Malayalam: കാൽസ്യം kālsyaṁ
calcium in Sanskrit: छौरेय chaureya
calcium in Tagalog: kalsiyo
calcium in Arabic: كَلْسِيُوم kalsiyūm, كَالْسِيُوم kālsiyūm
calcium in Malay: kalsium, zat kapur
calcium in Indonesian: kalsium, zat kapur
calcium in Persian: کلسیم kalsiom
calcium in Thai: แคลเซียม kɛɛl-sîiam
calcium in Vietnamese: canxi

Examples of calcium in a sentence

By molar fraction, calcium oxide contains equal parts calcium and oxygen.
Calcium bursts would increase spermatozoa motility, where cholesterol would decapacitate spermatozoa, so preventing untimely activation.
Because of his low calcium intake, the process of osteozecathia had begun.

All 40 example sentences with calcium

Forms of calcium

plural	calciums

Origin of calcium

Coined by British chemist Humphry Davy in 1808, from Latin calx (“lime, limestone”) because it occurs in limestone. By surface analysis, calc- + -ium.

Words formed from calcium

Phrases with calcium

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Questions about calcium

What does calcium mean?: Calcium means 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.
What is calcium in Hindi?: Calcium in Hindi is चूर्णातु (cūrṇātu). See Calcium meaning in Hindi.
What part of speech is calcium?: Calcium is a noun.
How do you pronounce calcium?: Calcium is pronounced /ˈkælsi.əm/ (UK).
What is the plural of calcium?: The plural of calcium is calciums.

Words near calcium in the dictionary

Adapted from Wiktionary: calcium (page history and authors); calcium (Bengali Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Pronunciation audio from Wikimedia Commons, each file under its own free license: en-us-calcium.ogg, LL-Q1860 (eng)-Tesco250-calcium.wav.

Cite this entry: “calcium.” Word.ws, https://word.ws/calcium. Based on Wiktionary, CC BY-SA 4.0.