noun
- a double-walled container with a vacuum between the walls, used to store liquids at very low temperatures
Usage: also called a Dewar flask or vacuum flask; named after Scottish scientist James Dewar
Examples
- The laboratory stored liquid nitrogen in a dewar to keep it at extremely low temperatures.
- A dewar flask is commonly used in scientific research to preserve cryogenic liquids.
- The insulated dewar prevented the liquid helium from evaporating too quickly.
- Scientists filled the dewar with liquid oxygen for the experiment.