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oxygen British & World English

A colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air

oxygen New Oxford Dictionary for Writers & Editors

chemical element of atomic number 8

O in oxygen British & World English

A colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air

oxygen bar British & World English

An establishment where people pay to inhale pure oxygen for its reputedly therapeutic effects

oxygen debt British & World English

A temporary oxygen shortage in the body tissues arising from exercise

oxygen mask British & World English

A mask placed over the nose and mouth and connected to a supply of oxygen, used when the body is not able to gain enough oxygen by breathing air, for example at high altitudes, or because of a medical condition

oxygen tent British & World English

A tent-like enclosure within which the air supply can be enriched with oxygen to aid a patient’s breathing

basic oxygen process British & World English

A steel-making process in which a jet of oxygen is delivered by a lance on to a molten mixture of pig iron and scrap steel in a retort lined with a basic refractory. Excess carbon is burnt away, producing enough heat to keep the iron molten, and the oxidized impurities are removed as gases or slag

biochemical oxygen demand British & World English

The amount of dissolved oxygen that must be present in water in order for microorganisms to decompose the organic matter in the water, used as a measure of the degree of pollution


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