Definition

A special container that keeps liquids hot or cold by using a vacuum to prevent heat transfer.

Example

The scientist used a dewar to store the liquid nitrogen safely.

Conversation

Have you ever used a dewar for your experiments?

Yeah, I actually have one for storing liquid nitrogen.

That sounds really useful; does it keep the temperature stable?

Absolutely, it’s great for maintaining the cold without losing any gas.

Synonyms & Antonyms

Root Explanation

The word 'dewar' originates from Scottish Gaelic 'deòra', meaning a vessel or container. It specifically refers to a type of vacuum flask used to keep liquids hot or cold.

Memory Tip

Think of a special 'vessel' ('deòra') designed to keep drinks at the right temperature — that's what a dewar is.

Visually Confused Words