Last Updated：2025/11/19

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The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas.

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oxygen

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Source Word

oxygen

IPA(Pronunciation)

/ˈɒksɪdʒən/

Noun

countable uncountable figuratively

Japanese Meaning

化学元素の酸素。原子番号8、相対原子質量15.9994を持つ無色、無臭の気体。

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The scientist measured the concentration of oxygen in the sealed chamber before starting the experiment.

Google Translation / DeepL Translation

科学者は実験を始める前に、密閉室内の酸素濃度を測定した。

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Molecular oxygen (O₂), a colorless, odorless gas at room temperature, also called dioxygen.

Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light.

Google Translation / DeepL Translation