noun

oxygen

oxygen

Humans need oxygen to breathe.

Humans need oxygen to breathe.

Water is made of hydrogen and oxygen.

Water is made of hydrogen and oxygen.

a chemical element that is a gas with no smell or colour Humans need oxygen to breathe.

Related concepts: air, gas

From French 'oxygène', coined from Greek 'oxys' (acid) + '-genēs' (producing), because it was once thought to be a component of all acids.

The 'O' in the chemical formula for water, H₂O, stands for oxygen. This makes it easy to remember.

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