Dewar
Alternative forms
Origin
From the name of inventor James Dewar
Full definition of dewar
Noun
dewar
(plural dewars)- 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.
- 2009, February 17, Guy Gugliotta, Perseverence Is Paying Off for a Test of Relativity in Space, A large thermos-like container called a dewar contained 645 gallons of liquid helium to be cooled to within two degrees of absolute zero.