dewar flask dewar • dewater · · · Info · Definitions · Characters · · dewar flask · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) vacuum flask that holds liquid air or helium for scientific experiments. Synonyms: Dewar flask, Dewar. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 k latin small letter k U+006B l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073 w latin small letter w U+0077