Longman Dictionary of Contemporary English
Wiktionary
n. 1 (synonym of thermos English) 2 (context chemistry English) A Dewar vessel is the scientific version, and is most often used to store liquified gases. 3 (context chemistry English) A type of glass flask used in a laboratory similar to an Erlenmeyer flask, but with a side spout used for connection to an aspirator. Also known as a Büchner flask.
WordNet
n. flask with double walls separated by vacuum; used to maintain substances at high or low temperatures [syn: vacuum bottle]
Wikipedia
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. Invented by Sir James Dewar in 1892, the vacuum flask consists of two flasks, placed one within the other and joined at the neck. The gap between the two flasks is partially evacuated of air, creating a near- vacuum which significantly reduces heat transfer by conduction or convection.
Vacuum flasks are used domestically to keep beverages hot or cold for extended periods of time and for many purposes in industry.
Usage examples of "vacuum flask".
Using a short length of nylon cable, he attached the sphere to a laboratory vacuum flask in which he would collect the gas sample.
It looks likely, considering that the tubes were carefully sealed and were being carried in the dark in a vacuum flask - and incidentally, the vacuum flask would have been necessary to maintain the tubes in a chilled environment, say 4°.
If you've got a vacuum flask fill it with coffee and make a few sandwiches.
He waved away the genital attachment- which was absurdly huge, like a vacuum flask.
She went off yesterday morning with sandwiches and a vacuum flask of tea and her knitting.
I unplugged the transmitter, drank the remains of the soup in the vacuum flask, and went to bed.
As they walked up the Banbury Road, she told him about the night she hid in the wardrobe and watched Lord Asriel show the Jordan Scholars the severed head of Stanislaus Grumman in the vacuum flask.
It was an office the least amount of office you could get: a small table, one chair, a cheap cashbox, a vacuum flask, a dirty cup and a copy of the Daily Mirror.
One of them went to Kennikin with a vacuum flask and poured out a cup of steaming hot coffee which he offered obsequiously.
Instead he pushed towards him a glass and a vacuum flask containing ice-cubes and water.