dewar
/ˈduː.ɚ/
Word Rarity
Rare
Frequency: 2.71 in modern English
9
Scrabble Score
5
Letters
2
Syllables
5
Unique Chars
Meaning
noun
A glass or metal double-walled flask for holding a liquid without much loss or gain of heat; a vacuum bottle or thermos. Generally used for scientific purposes and in particular for cryogenic work.
noun
A vacuum flask; a vessel which keeps its contents hotter or cooler than their environment without the need to modify the pressure, by interposing an evacuated region to provide thermal insulation between the contents and the environment.
Example Sentences
- "A large thermos-like container called a dewar contained 645 gallons of liquid helium to be cooled to within two degrees of absolute zero."
Etymology
From Scottish Gaelic deòradh (“pilgrim, stranger”), an occupational surname for a custodian of holy relics. It could also be an habitational surname, from Dewar, Scottish Borders. The flask is named for James Dewar, who is credited with its invention.
Origin
Word Breakdown
- Root: deòradh
Regional Pronunciation
- American English: /ˈduː.ɚ/
- British English: /ˈdjuːwə(ɹ)/
Usage
Inflected Forms
Derived Forms
Phrases
Synonyms
Dewar bottle
Dewar bulb
Dewar flask
Dewar vessel
Dewar tube
vacuum flask
vacuum thermos
vacuum thermos bottle
vacuum thermos bulb
vacuum thermos flask
vacuum thermos vessel