DEWAR Meaning and
Definition
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A dewar, also known as a vacuum flask, is a double-walled container specifically designed to keep its contents at a consistent temperature. The name "dewar" is derived from its inventor, Sir James Dewar, a British scientist who invented it in the late 19th century.
The primary purpose of a dewar is to provide exceptional insulation and prevent unwanted heat transfer to or from the contents inside. It consists of two glass or metal walls, placed one inside the other, with a space between them. This space is often evacuated to create a vacuum, reducing heat transfer by conduction or convection. The walls are generally highly reflective to further minimize radiant heat transfer.
Dewars are commonly used in scientific laboratories and industrial settings where temperature control is essential. They are frequently employed to store and transport extremely low-temperature liquids, such as liquid nitrogen or liquid helium. The vacuum insulation of dewars allows these substances to be kept at their cryogenic temperatures for extended durations.
Additionally, dewars are utilized in various other applications like in the storage and transportation of liquefied gases, samples, or even as thermos containers for maintaining the temperature of food and beverages. The double-walled construction and vacuum insulation make dewars efficient and reliable for sustaining desired temperatures.
In summary, a dewar is a specialized container that employs vacuum insulation to maintain a consistent temperature inside, typically used in scientific, industrial, or everyday settings for storing and transporting substances at extreme temperatures or keeping food and beverages hot or cold.
Common Misspellings for DEWAR
Etymology of DEWAR
The word "dewar" has its etymology in the Scottish surname "Dewar", which originated as a patronymic name. A patronymic name is formed by adding a suffix to the father's name, indicating "son of". In this case, "Dewar" is derived from the Gaelic given name "Dubhghall", meaning "dark stranger" or "Dark Foreigner". Over time, the surname "Dewar" became associated with the Dewar family from Scotland and eventually gave rise to the use of "dewar" as a common noun. Today, it is often used to refer to a type of insulated container used for storing and transporting food, chemicals, or scientific samples, named after the Scottish scientist Sir James Dewar who invented it.
Idioms with the word DEWAR
Similar spelling words for DEWAR
- deer,
- swear,
- dery,
- DERR,
- deary,
- deere,
- war,
- dew,
- dewire,
- Derry,
- wear,
- Deharo,
- dwarf,
- derrow,
- dearie,
- tear,
- dear.
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