bell jar Meaning, Definition & Usage
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noun a bell-shaped glass cover used to protect and display delicate objects or to cover scientific apparatus or to contain gases
bell glass.
WordNet
Bell" jar`
Definitions
(Phys.) 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 .
