Definition of Dewar

1. Noun. Vacuum flask that holds liquid air or helium for scientific experiments.

Exact synonyms: Dewar Flask
Generic synonyms: Vacuum Bottle, Vacuum Flask

2. Noun. Scottish chemist and physicist noted for his work in cryogenics and his invention of the Dewar flask (1842-1923).
Exact synonyms: Sir James Dewar
Generic synonyms: Chemist, Physicist

Definition of Dewar

1. 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. ¹

2. 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. ¹

¹ Source:

Definition of Dewar

1. a double-walled flask [n -S]

Medical Definition of Dewar

1. Cryogenic storage container in which two concentric vessels are separated by an insulating vacuum which prevents conductive and convective heat losses. The vessels themselves are often silvered to reduce radiative heat losses. (09 Oct 1997)

Lexicographical Neighbors of Dewar

dew drop
dew itch
dew point
dew points
dew water
dew worm
dewar (current term)

Literary usage of Dewar

Below you will find example usage of this term as found in modern and/or classical literature:

1. Reports of Cases Decided in the High Court of Chancery: By the Right Hon by Nicholas Simons, Great Britain Court of Chancery, John Leach, Anthony Hart, Lancelot Shadwell, Richard Torin Kindersley (1835)
"Caroline Lydia dewar did not survive her Mother, Caroline dewar, ... In April 1804, Caroline dewar, in exercise of the Power given to her by the Will, ..."

2. Pennsylvania Archives by Pennsylvania Dept. of Public Instruction, Pennsylvania State Library (1853)
"The Humble Petition of David dewar, Commander of the Schooner Recovery, now at Anchor before the Town of New Castle, on the River Delaware, ..."

3. The New-York Legal Observer by Samuel Owen (1846)
"That the abandonment by Messrs; dewar of the cargo to the defendants, ... dewar. That the William Wright did not become the private vessel of the charterers ..."

4. Report of the Annual Meeting (1889)
"On the Absorption Spectrum of Oxygen.1 By Professors LIVEING, FRS, and dewar, FRS Of all the absorptions Fraunhofer's A required the least amount of oxygen ..."

5. Proceedings of the Royal Society of London by Royal Society (Great Britain) (1879)
"Liveing and dewar. [Apr. 3r The paper concludes with some notes by Professor ... By Gr. D. LIVEING, MA, Professor of Chemistry, and J. dewar, MA, FRS, ..."

6. Bulletin of the University of Wisconsin by University of Wisconsin (1908)
"dewar BULB AND THERMO BOTTLES The dewar bulb which is used in physics laboratories involves the same principle. The construction of vacuum ..."

7. The Revised Reports: Being a Republication of Such Cases in the English by Robert Campbell, Frederick Pollock, Oliver Augustus Saunders, Arthur Beresford Cane, Joseph Gerald Pease, William Bowstead, Great Britain Courts (1899)
"... dewar died in December, 1812, after having attained the age of MACKINNON ... her daughter Caroline dewar, survived their mother and attained 21. ..."

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