Dewar

/ˈdjuːwə(ɹ)/

Dewar

English Noun Top 38,628

Definition

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.

Etymology

From Scottish Gaelic deoradh (“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.