How to Spell oxygen

oxygen - noun

• 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.

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

• A mixture of oxygen and other gases, administered to a patient to help them breathe.

• An atom of this element.