Dewar 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.
noun
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Other Word Forms

Noun

Singular:
dewar
Plural:
dewars

Origin of dewar

  • Named for James Dewar, who is credited with its invention.

    From Wiktionary