noun
a type of container used for storing and transporting liquid gases, typically made of insulated metal
adjective
relating to or characteristic of a Dewar flask or container
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The scientist stored the samples in a dewar to keep them at a constant low temperature.
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I need to grab the dewar from the lab before we head to the field trip.
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Hey, can you pass me that dewar over there?
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Her heart felt like a dewar, cold and untouched by warmth.