bell jar

noun

1. 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.

bell jar

noun

1. a bell-shaped glass cover used to protect flower arrangements or fragile ornaments or to cover apparatus in experiments, esp to prevent gases escaping

Word History and Origins

Origin of bell jar¹

First recorded in 1875–80