| vacuum flask n. See vacuum bottle. |
vacuum flask
n
an insulating flask that has double walls, usually of silvered glass, with an evacuated space between them. It is used for maintaining substances at high or low temperatures Also called Thermos Dewar flask
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  vacuum flask - flask with double walls separated by vacuum; used to maintain substances at high or low temperaturesDewar, Dewar flask - vacuum flask that holds liquid air or helium for scientific experiments flask - bottle that has a narrow neck thermos, thermos bottle, thermos flask - vacuum flask that preserves temperature of hot or cold drinks |
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