oxygen /okˈsi-jən/

1. A gaseous element (symbol O; atomic number 8) without taste, colour or smell, forming part of the air, water, etc, and supporting life and combustion
2. Something indispensable for existence

oxˈygenate (or /ok-sijˈ/) transitive verb

1. To oxidize
2. To impregnate or treat with oxygen

A chemical containing oxygen used as a fuel additive to make combustion more efficient and thereby reduce the emission of pollutants

oxygenāˈtion noun

oxˈygenator noun

1. An apparatus performing functions of heart and lungs during an operation
2. Something that supplies oxygen

oxˈygenize or oxˈygenise transitive verb

To oxygenate

oxygˈenous adjective

oxygen bar noun

An establishment where patrons pay to experience the therapeutic effects of inhaling pure oxygen

oxygen debt noun

A depletion of the body's store of oxygen occurring during bursts of strenuous exercise, replaced after bodily activity returns to normal levels

oxygen mask noun

A masklike breathing apparatus through which oxygen is supplied in rarefied atmospheres to mountaineers, aircraft passengers, etc

oxygen tent noun

A tent-like enclosure in which there is a controllable flow of oxygen, erected round a patient to aid breathing

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