calcium

/ˈkælsi.əm/

noun

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.

Calcium is essential for strong bones and teeth.

Google翻訳 / DeepL翻訳

詳細

意味（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翻訳 / DeepL翻訳

詳細

意味（2）

(countable) An atom of this element.

詳細

calcium

Dictionary quizzes to help you remember the meaning

ログイン / 新規登録

アプリをダウンロード！

calcium

Dictionary quizzes to help you remember the meaning

ログイン / 新規登録

ログイン

──── or ────

新規登録

──── or ────

アプリをダウンロード！