oxygen
UK: ˈɒksɪdʒən | US: ˈɑːksɪdʒən
n. a colorless, odorless reactive gas, the chemical element of atomic number 8, essential for respiration and combustion.
The word "oxygen" was coined in 1777 by French chemist Antoine Lavoisier, derived from Greek roots. "Oxy-" comes from the Greek "oxys" (sharp, acid), referencing oxygen's role in forming acids, and "-gen" from "gennan" (to produce), as it was believed to be a component of all acids. Though this theory was later disproven, the name persisted. The term reflects early scientific understanding of the gas's reactive properties.
Plants release oxygen during photosynthesis.
Oxygen levels in the room dropped dangerously low.
Scuba divers carry tanks of compressed oxygen.
The patient was given supplemental oxygen.
Fire cannot burn without oxygen.