thermos

[thur-muhs]

noun

1. a vacuum bottle or similar container lined with an insulating material, such as polystyrene, to keep liquids hot or cold.

Thermos

/ ˈθɜːməs /

noun

1. a type of stoppered vacuum flask used to preserve the temperature of its contents See also Dewar flask

Word History and Origins

Origin of thermos¹

First recorded in 1905–10; formerly a trademark

Related Words

• flask 
• water bottle