bell jar



a bell-shaped glass jar or cover for protecting delicate instruments, bric-a-brac, or the like, or for containing gases or a vacuum in chemical experiments.

Origin of bell jar

First recorded in 1875–80
Also called bell glass.

Bell Jar, The


a novel (1963) by Sylvia Plath. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bell glass

Historical Examples of bell glass

  • I cover this sheet with a bell-jar standing in a depth of water.

  • The solution, evaporated in a bell-jar over sulphuric acid, yields crystals which are neutral.

  • By the vivid combustion of phosphorus in a stream of dry atmospheric air, or under a bell-jar, copiously supplied with dry air.

  • In the very middle of the bell-jar of visibility granted them all at once, stood a black rectangular object.

    Equation of Doom

    Gerald Vance

  • The flask is allowed to remain for an hour in a cool place, and is then placed under a bell-jar, at a temperature of 70° Fahr.


    J. G. M'Pherson

British Dictionary definitions for bell glass

bell jar


a bell-shaped glass cover used to protect flower arrangements or fragile ornaments or to cover apparatus in experiments, esp to prevent gases escaping
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012