(1842–1923), Scottish chemist and physicist. He is chiefly remembered for his work in cryogenics, in which he devised the vacuum flask, achieved temperatures close to absolute zero, and was the first to produce liquid oxygen and hydrogen in quantity.
Definition of Dewar, Sir James in US English:
Dewar, Sir James
proper nounˈd(y)o͞oər
(1842–1923), Scottish chemist and physicist. He devised the vacuum flask, achieved temperatures close to absolute zero, and was the first to produce liquid oxygen and hydrogen in quantity.