water vapour
Definition
- Noun:
- Water in a gaseous state: "water vapour" refers to water that has evaporated and exists as a gas in the air, typically at temperatures below its boiling point. It is an invisible component of the Earth's atmosphere.
Usage
- "Water vapour" is an uncountable noun. It is the scientific and technical term for gaseous water in the air. It is a key component in discussions of weather, climate, and physical processes like evaporation and condensation.
- Example:
Examples
- Noun:
- Clouds form when water vapour in the atmosphere cools and condenses into tiny droplets.
- The greenhouse effect is influenced by gases like carbon dioxide and water vapour.
- Warm air can hold more water vapour than cold air.
Advanced Usage
- "Water vapour pressure": the pressure exerted by water vapour in a mixture of gases.
- The meteorologist calculated the water vapour pressure to predict fog formation.
- "Water vapour transmission": a measure of how easily water vapour can pass through a material.
- This fabric has a high water vapour transmission rate, making it breathable.
Variants and Related Words
- Vapor / Vapour (US/UK spelling) (n): the general term for a substance in its gaseous state, often diffused in the air.
- The chemist studied the properties of the vapour.
- Water vapor (US spelling): The American English spelling of "water vapour".
- Steam (n): Often confused with water vapour. Steam is technically water vapour at or above boiling temperature and is often visible as a mist of water droplets.
- Steam rose from the boiling kettle.
Synonyms
- Moisture: A more general term for water or other liquid in small quantities, often as vapour or condensed on a surface.
- Humidity: Specifically refers to the amount of water vapour present in the air.
Related Phrases
- Water vapour content: The specific amount of water vapour in a given volume of air.
- The instrument measures the water vapour content of the atmosphere.
- Saturated with water vapour: Describes air that holds the maximum amount of water vapour possible at a given temperature.
- The air near the lake was saturated with water vapour.
Noun
-
water in a vaporous form diffused in the atmosphere but below boiling temperature
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