oxygen

noun

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

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.

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

(countable) An atom of this element.

(figurative) A condition or environment in which something can thrive.

Roots

oxysoxy- · Greek · sharp, acid gignomai-gen · Greek · produce, beget

Synonyms for oxygen

hydrogenn nitrogenn chlorinen fluorinen heliumn argonn

Synonyms & related words for oxygen

Find synonyms, related words, and the definition of oxygen — including hydrogen, nitrogen, chlorine, fluorine, helium, argon. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to oxygen

Explore words related to oxygen — words associated with it, words that go with it, and its nearest matches in meaning. Related words include oxygenous, oxygenic, phosgenite, scolecite, wavellite, triphylite, protoxide, heulandite. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for oxygen

Common synonyms for oxygen include hydrogen, nitrogen, chlorine, fluorine, helium, argon — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does oxygen come from?

The word oxygen breaks down into 2 roots of Greek origin: oxy-, from Greek oxys (“sharp, acid”); and -gen, from Greek gignomai (“produce, beget”). Explore each root to see other English words built from the same source.