Dewar vessel


a container with an evacuated space between two walls that are highly reflective, capable of maintaining its contents at a near-constant temperature over relatively long periods of time; thermos.

Origin of Dewar vessel

1900–05; named after Sir James Dewar, its inventor
Also called Dewar, Dewar flask. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019