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/ˈɒk.sɪ.d͡ʒən/ · noun
The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental oxygen to distinguish it from molecular oxygen..
Holonyms: dioxygen, O₂, oxygen (loose sense)
By molar fraction, calcium oxide contains equal parts calcium and oxygen.
Meronym: oxygen (strict sense)
About 21% of the air you breathe is oxygen.
Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light.
Look first at any structure to see if there is a carbon with two oxygens attached. Hemiacetals, hemiketals, acetals, and ketals are all alike in that regard.
Silence is the oxygen of shame.
They hoped to starve the terrorists of the oxygen of publicity.
Use oxygen 18 when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Oxygen 18 means The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental oxygen to distinguish it from molecular oxygen..
Common synonyms include sourstuff, E948[packaging gas]]>, dioxygen, mul:O₂.
The opposite depends on the specific sense.
Holonyms: dioxygen, O₂, oxygen (loose sense)
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