# Dewar flask

> English word · Noun

## Definitions
1. A type of double-walled vacuum flask with silver lining.

## Etymology
Named after James Dewar.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/dewar-flask