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| Dew·ar flask [ d ər flàsk ] (plural Dew·ar flasks) or Dew·ar vac·u·um flask [ d ər flàsk ] (plural Dew·ar vac·u·um flasks) |
noun |
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| Definition: |
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insulated thermal flask: a double-walled silvered glass or metal flask with a vacuum between the walls, providing thermal insulation. It is frequently used to store liquefied gases.
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| [Mid-20th century. After Sir James Dewar (1824-1923), British physicist and chemist] |
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