Share this entry

Share this page

dewar

Line breaks: dewar
Pronunciation: /ˈdjuːə
 
/

Definition of dewar in English:

noun

A double-walled flask of metal or silvered glass with a vacuum between the walls, used to hold liquids at well below ambient temperature.
Example sentences
  • However, only the sample dewar was filled with liquid nitrogen.
  • Liquid helium will boil off constantly through a special porous plug in the dewar to maintain the science probe at its required temperature for up to 18 months.
  • But in 1999 the project experienced major development problems when the large thermos bottle, called a dewar, which holds the supercold helium surrounding the instruments, did not cool down as quickly as expected.

Origin

late 19th century: named after Sir James Dewar (see Dewar, Sir James).

Definition of dewar in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day terpsichorean
Pronunciation: ˌtərpsikəˈrēən
adjective
of or relating to dancing