Definition of "dewar" []

• A vacuum flask; a vessel which keeps its contents hotter or cooler than their environment without the need to modify the pressure, by interposing an evacuated region to provide thermal insulation between the contents and the environment. (noun)

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• "If you are serious enough to try it makes sense to rent a dewar to transport and store the LN2."
• "My eyes started focussing and I saw a note pasted to the faceplate of my dewar."
• "They run best cold, around -100 degrees centigrade, and since a coolant failure would ruin them, each of the six columns of CCDs has its own dewar, a sort of thermos bottle, of coolant."