Last Updated：2025/11/19

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

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calcium

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Source Word

calcium

IPA(Pronunciation)

/ˈkælsi.əm/

Noun

countable uncountable

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

Japanese Meaning

化学元素。原子番号20。柔らかく銀白色のアルカリ土類金属であり、石灰岩中の炭酸塩や多くの岩石中のシリケートとして自然に存在する。

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Google Translation / DeepL Translation

カルシウム（Ca、原子番号20）は柔らかく銀白色のアルカリ土類金属で、石灰岩では炭酸塩として、多くの岩石ではケイ酸塩として自然に存在します。

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Sense（1）

The chemical element (Symbol Ca), with an atomic number 20. It is 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 manganese atoms and a calcium atom.

Google Translation / DeepL Translation

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Sense（2）

(countable) An atom of this element.

calciums

（ plural ）

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calcium

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calcium

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