oxygen
/ˈɒksɪdʒən/ (bre, ipa) · /ˈɑːksɪdʒən/ (ame, ipa) · /ˈäk-si-jən/ (ame, mw)
oxygen — noun
1. a colourless gas element in the atmosphere and in water that most life needs in
a colourless gas element in the atmosphere and in water that most life needs in order to breathe.
Hikers rested while thin mountain air gave them less oxygen.
oxygen in the air
The nurse placed an oxygen mask over Leo's mouth and nose.
collocation: oxygen mask
Fish die quickly when warm water holds too little oxygen.
Fire needs oxygen, so Dad covered the grill with a lid.
The monitor showed low oxygen levels in the baby's blood.
- O2
the chemical symbol, common in science and medical contexts
- medical oxygen
oxygen prepared for treatment, so it is narrower than the general word
- supplemental oxygen
extra oxygen given when normal air is not enough
文法句型
oxygen in the air
oxygen levels in the blood
give someone oxygen
run out of oxygen
用法筆記
Usually uncountable. Common with nouns such as 'mask', 'tank', 'supply', and 'level', and often used in science, hospital, and climbing contexts when speakers need to talk about the gas itself rather than ordinary air.