Dewar noun. ['dju:ǝ] L19.
[Sir James Dewar (1842-1923), Brit. physicist & chemist.]
1. (Also dewar.) In full Dewar vessel, Dewar flask, etc. A double-walled flask with an evacuated interspace for preventing the transfer of heat into or from the inner container. L19.

2. Chemistry. Used attrib. of structures for the benzene molecule which were postulated by Dewar and are of higher energy and lower symmetry than the Kekulé structure. E20.

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