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dewar

A vacuum-insulated container used for storing liquids at extremely low temperatures, such as liquid nitrogen or helium.
Danh từ
Số nhiều: dewars

This term is a specialized piece of laboratory equipment, primarily used in physics, chemistry, and cryogenics. It is named after Sir James Dewar, who invented the vacuum flask. While a common household thermos is technically a type of Dewar vessel, in a professional scientific context, a "dewar" typically refers to larger, industrial-grade containers designed for the bulk storage and transport of cryogenic fluids.

Because it describes a specific physical object, it follows standard English countability rules. It is used in technical registers and is rarely encountered in general conversation unless discussing laboratory procedures or extreme temperature experiments.

Ý nghĩa

Danh từ

A vacuum-insulated container used for storing liquids at extremely low temperatures, such as liquid nitrogen or helium.

The scientist carefully poured the liquid helium from the dewar into the cryostat.

Ví dụ

Please carefully transport the dewar to the cooling station.

Please carefully transport the dewar to the cooling station.

School Life

The liquid nitrogen is stored in a large stainless steel dewar.

The liquid nitrogen is stored in a large stainless steel dewar.

I need to refill the dewar before the experiment begins.

I need to refill the dewar before the experiment begins.

School Life

Is this dewar vacuum sealed properly?

Is this dewar vacuum sealed properly?

The technician checked the pressure valve on the cryogenic dewar.

The technician checked the pressure valve on the cryogenic dewar.

Business

We should use a smaller dewar for this specific sample.

We should use a smaller dewar for this specific sample.

The dewar must be kept upright to prevent spills.

The dewar must be kept upright to prevent spills.

He wondered if the dewar would hold the temperature overnight.

He wondered if the dewar would hold the temperature overnight.

Carefully pour the helium into the dewar to avoid splashing.

Carefully pour the helium into the dewar to avoid splashing.

School Life

Từ liên quan

vacuum flaskthermosvacuuminsulationflaskcryogenicsnitrogenheliumtemperaturethermalheatcoldstoragecontainervesselglasssilvering
Cập nhật lần cuối: May 2026Báo lỗi