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TOEFL BNC: 3719 COCA: 3839

oxygen

Word family 
Related topics: Elements
ox·y·gen /ˈɒksɪdʒən $ ˈɑːk-/ ●●○ noun [uncountableU]  
HCEa gas that has no colour or smell, is present in air, and is necessary for most animals and plants to live. It is a chemical element: symbol O 氧〔一种化学元素，符号为O〕
Examples from the Corpus
oxygen• In a similar way, sheets of octahedra are formed from aluminium, oxygen and hydroxyl groups.• The relief of pain by oxygen inhalations, which reduce cerebral blood flow, also suggests that this is a factor.• Tired, tired, lungs aching for oxygen.• Soon she was barely able to walk and she had oxygen cylinders fitted in her bedroom.• Besides discussing ducks, the report also will look at reducing erosion, increasing oxygen levels and improving fishing.• This increases your heart rate and encourages more oxygen into the body as you breathe more quickly.• Like yeast, the cells in our bodies usually burn glucose with oxygen because it releases so much energy.• Is your oxygen supply at risk?
Origin oxygen
(1700-1800) French oxygène, from Greek oxys “sharp, acid” + French -gène “forming”; because it was believed that oxygen forms part of all acids
ox·y·gen noun
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