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[mass noun] A colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.‘if breathing stops, there is no oxygen getting to the brain and the cells begin to die’→ oxy-‘hydrogen and carbon in the fuel combine with the oxygen in the air to form carbon dioxide and water’[as modifier] ‘an oxygen supply’
- ‘The heart muscle is supplied with oxygen by blood arriving in the coronary arteries.’
- ‘Copper reacts with oxygen and carbon dioxide to form a greenish patina of copper carbonate.’
- ‘Iron is needed to produce more blood to supply the baby with the necessary nutrients and oxygen.’
- ‘It results from a temporary reduction in blood and oxygen supply to part of the brain.’
- ‘To avoid the production of oxygen via photosynthesis, plants were kept in the dark.’
- ‘Despite the addition of oxygen and the issue of potash cartridges, the air is foul.’
- ‘On the one hand, there is the body's need for oxygen and its supply from the lungs.’
- ‘There may also be a greatly reduced oxygen content in the air at the bottom of deep wells.’
- ‘Energy is generated by the reaction of hydrogen and oxygen across a catalytic membrane.’
- ‘Solar panels power an electrolyser that separates water into hydrogen and oxygen.’
- ‘In other words, it is possible to die from a lack of oxygen, because of ozone poisoning.’
- ‘This maintained the same concentration of oxygen in the gas flow at the point of analysis.’
- ‘There seems to be less oxygen in town air on a very hot day, even in a quiet corner like Bath Place.’
- ‘The air in this chamber is very low in oxygen, so divers are advised not to remove their regulators.’
- ‘It is important to minimize the new wine's exposure to oxygen, whatever its colour.’
- ‘The chemicals in tobacco reduce the flow of oxygen around the mother's blood stream.’
- ‘Therefore in light plants gave out oxygen, but in the dark they emitted carbon dioxide.’
- ‘In addition, the very reactive singlet oxygen can be generated by an input of energy.’
- ‘He also had difficulty breathing and had to be given oxygen on arrival at hospital.’
- ‘This oxygen may also support nitrifying bacteria that convert ammonia to nitrate.’
Late 18th century: from French ( principe) oxygène acidifying constituent (because at first it was held to be the essential component in the formation of acids).
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