Flight attendants reminded passengers to secure their oxygen masks before assisting others.

After a long week, she and her friends went to an oxygen bar to breathe aromatherapy-scented oxygen and unwind.

After the severe asthma attack, the patient required oxygen therapy to stabilize her breathing.

During the emergency drill, the instructor showed us how to secure the oxygen mask quickly and comfortably.

The diver checked the oxygen tank before descending.

In models of massive stars, oxygen burning is the nucleosynthesis phase that follows carbon burning, during which neon disintegrates and oxygen fuses to form silicon, phosphorus, sulfur, and other elements up to atomic number 40.

The geologist carefully examined the oxygen stone, convinced it could unlock ancient atmospheric secrets.

During intense sprint intervals, runners often experience an oxygen deficit that must be repaid during recovery.

The scientists warned that oxygen depletion in the estuary, caused by agricultural runoff and rising temperatures, could lead to massive fish kills this summer.

The paramedic quickly checked the oxygen cylinder before entering the smoke-filled building.