What does bell jar mean?

Definitions for bell jar
bell jar

This dictionary definitions page includes all the possible meanings, example usage and translations of the word bell jar.

Princeton's WordNet

  1. bell jar, bell glassnoun

    a bell-shaped glass cover used to protect and display delicate objects or to cover scientific apparatus or to contain gases


  1. bell jarnoun

    A piece of laboratory equipment used for creating vacuums, often made of glass in a bell-like shape.


  1. Bell jar

    A bell jar is a glass jar, similar in shape to a bell (i.e. in its best-known form it is open at the bottom, while its top and sides together are a single piece), and can be manufactured from a variety of materials (ranging from glass to different types of metals). Bell jars are often used in laboratories to form and contain a vacuum. It is a common science apparatus used in experiments. Bell jars have a limited ability to create strong vacuums; vacuum chambers are available when higher performance is needed. They have been used to demonstrate the effect of vacuum on sound propagation. In addition to their scientific applications, bell jars may also serve as display cases or transparent dust covers. In these situations the bell jar is not usually placed under vacuum.


  1. bell jar

    A bell jar is a glass container or cover, usually in the shape of a bell, that is used in laboratories to create a vacuum or contain certain substances. It is also used for display or protective purposes, such as in showcasing delicate objects or protecting plants.

Webster Dictionary

  1. Bell jar

    a glass vessel, varying in size, open at the bottom and closed at the top like a bell, and having a knob or handle at the top for lifting it. It is used for a great variety of purposes; as, with the air pump, and for holding gases, also for keeping the dust from articles exposed to view


  1. Bell jar

    A bell jar is a piece of laboratory equipment used to contain vacuums. It can be similar in shape to a bell, and can be manufactured out of a variety of materials. A bell jar is placed on a base which is vented to a hose fitting, which can be connected via a hose to a vacuum pump. By pumping the air out of the bell jar, a vacuum is formed. The lower edge of a vacuum bell jar is a substantial flange of heavy glass, ground smooth on the base. Its base is equally heavy and flattened. A smear of vacuum grease is usually applied between them. As the vacuum inside gives rise to a considerable compression force, there is no need to clamp this seal. For this reason, a bell jar cannot be used to contain pressures above atmospheric, only below. Purely decorative belljars were common in the Victorian period for the display of clocks and taxidermy, as a transparent dust cover. These are of thin glass, with more care taken over their optical clarity. They do not have a thickened base flange. For this reason they are not suitable for vacuum use and will usually fail if pumped down. Other similar glass domes were also used as cheese domes or garden cloches.

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How to say bell jar in sign language?


  1. Chaldean Numerology

    The numerical value of bell jar in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of bell jar in Pythagorean Numerology is: 6

Examples of bell jar in a Sentence

  1. Sylvia Plath, The Bell Jar:

    To the person in the bell jar, blank and stopped as a dead baby, the world itself is a bad dream.

  2. Michel Berthommier:

    People will not want to taste a Chateau Petrus wine, a lobster or caviar under a bell jar, if you force people to eat in these conditions they will prefer going to fast foods.

  3. Sylvia Plath:

    To the person in the bell jar, blank and stopped as a dead baby, the world itself is the bad dream.


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"bell jar." Definitions.net. STANDS4 LLC, 2024. Web. 27 Feb. 2024. <https://www.definitions.net/definition/bell+jar>.

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    call in an official matter, such as to attend court
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