carbon dioxide
Noun: 1. A heavy, odorless, colorless gas: A chemical compound (CO₂) that is naturally present in the Earth's atmosphere. It is produced by the respiration of animals and the decomposition of organic materials. Plants absorb it from the air to use in the process of photosynthesis.
- General Use: The term "carbon dioxide" is used to refer to the gas itself, often in scientific, environmental, and everyday contexts.
- Common Contexts: Discussions about biology (respiration, photosynthesis), climate change (as a greenhouse gas), chemistry, and industry.
- Noun:
- When we exhale, we release carbon dioxide.
- The increase in atmospheric carbon dioxide is a major contributor to global warming.
- Plants convert carbon dioxide and water into glucose and oxygen.
- Chemical Formula: Often represented by its chemical formula, CO₂.
- The experiment measured the concentration of CO₂ in the sample.
- In Compound Terms (Listed Separately): The term "carbon dioxide" forms the basis for several specific compound terms, which are distinct concepts:
- Carbon dioxide emissions: The release of CO₂ into the atmosphere, typically from human activities.
- Carbon dioxide scrubber: A device that removes CO₂ from air or other gas mixtures.
- CO₂: The standard chemical abbreviation for carbon dioxide.
- Carbonic acid gas: An older, less common name for carbon dioxide, especially when dissolved in water.
- CO₂ (the chemical formula is used as a direct synonym in technical writing).
- Carbonic anhydride (a technical synonym used in chemistry).
(Note: "Carbon dioxide" is a scientific term and is not typically used in idiomatic expressions. However, it is central to common environmental phrases.) * To absorb/capture carbon dioxide: Refers to the process where plants or technology take in CO₂. * Forests play a crucial role in absorbing carbon dioxide from the atmosphere. * To emit/release carbon dioxide: Refers to the process of producing and discharging CO₂. * Burning fossil fuels releases large amounts of carbon dioxide.
- a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis