Noun
thermos (plural thermoses)
A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents
thermos (plural thermoi)
(historical) A unit of measure whose identification remains very unclear.
About 1892, the idea occurred to him of using vacuum-jacketed vessels for the storage of liquid gases – the Dewar flask (otherwise known as a Thermos or vacuum flask ) – the invention for which he became most famous. Source: Internet
And although often saved for the colder months, a thermos flask is a very useful bit of picnic kit. Source: Internet
Bonilla takes a sip from her thermos and keeps her gaze straight ahead. Source: Internet
Dewar did not profit from the widespread adoption of his vacuum flask – he lost a court case against Thermos concerning the patent for his invention. Source: Internet
Often locals can be seen carrying leather cases containing a thermos of hot water, the traditional hollowed gourd called a mate or guampa, a metal straw called a bombilla, and the dried yerba mate leaves. Source: Internet
Taking its name from the Greek θερμός (pronounced thermos) meaning heat, the thermosphere begins about convert above the Earth. Source: Internet