Meanings
plural vacuum flasks
- chemistryA Dewar vessel, a scientific instrument used to store liquified gases.
- chemistryA type of glass flask used in a laboratory similar to an Erlenmeyer flask, but with a side spout used for connection to an aspirator.
Synonyms: Büchner flask, Dewar flask, Dewar vessel, vacuum bottle
Synonyms & antonyms
nounA type of glass flask used in a laboratory similar to an Erlenmeyer flask, but with a side spout used for connection to an aspirator.
nounSynonym of thermos.
More synonyms by meaning
nounflask with double walls separated by vacuum; used to maintain substances at high or low temperatures
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
vacuum flask. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/vacuum%20flask
“vacuum flask.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/vacuum%20flask. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “vacuum flask,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/vacuum%20flask.
Source: vacuum flask on Wiktionary, CC BY-SA 4.0.