oxygen
/'ɔksidʤən/
Definition
- Noun:
- A chemical element: Oxygen is a nonmetallic, bivalent element. It is normally found as a colorless, odorless, tasteless, nonflammable diatomic gas (O₂). It constitutes about 21 percent of the Earth's atmosphere by volume and is the most abundant element in the Earth's crust.
Usage
- Oxygen is essential for the respiration of most living organisms.
- It is a key component in combustion (burning) processes.
- In medical contexts, supplemental oxygen is administered to patients with breathing difficulties.
Examples
- Noun:
- Plants produce oxygen during photosynthesis.
- The diver checked her oxygen tank before descending.
- Water is a compound of hydrogen and oxygen.
Advanced Usage
- "Singlet oxygen": A high-energy, reactive form of oxygen.
- Singlet oxygen is involved in some photochemical reactions.
- "Dissolved oxygen": The amount of oxygen present in water, crucial for aquatic life.
- The health of the river is measured by its level of dissolved oxygen.
Variants and Related Words
- Oxygenate (verb): To supply, treat, or mix with oxygen.
- The machine oxygenates the blood.
- Oxygenation (noun): The process of supplying or combining with oxygen.
- Proper oxygenation of the pond is vital for the fish.
- Oxy- (prefix): A prefix meaning "containing oxygen" or "sharp" (as in acid), used in chemical names.
- Oxyacetylene (a mixture of oxygen and acetylene used in welding).
Synonyms
- O₂: The molecular formula for the common form of oxygen gas.
- Element 8: Refers to its atomic number on the periodic table.
Related Phrases
- "Oxygen mask": A device that provides oxygen to a person, often used in aircraft or hospitals.
- In case of cabin depressurization, oxygen masks will drop from the ceiling.
- "Oxygen debt": The extra oxygen required by the body after strenuous exercise to metabolize lactic acid.
- He was breathing heavily to repay the oxygen debt after the sprint.
Related Idioms
- "To be on oxygen": To require medical oxygen therapy to breathe.
- After his severe pneumonia, he was on oxygen for several weeks at home.
Noun
-
a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
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