leyden-jar

Leyden jar

noun Electricity.
a device for storing electric charge, consisting essentially of a glass jar lined inside and outside, for about two-thirds of its height, with tinfoil.

Origin:
1815–25; so called because invented in Leyden

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Collins
World English Dictionary
Leyden jar
 
n
physics an early type of capacitor consisting of a glass jar with the lower part of the inside and outside coated with tin foil
 
[C18: first made in Leiden]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

Leyden jar
1755, phial used for accumulating and storing static electricity, from Leyden (modern Leiden), city in Holland; so called because it was first described 1746 by physicist Pieter van Musschenbroek of Leyden (1692-1761).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
Leyden jar   (līd'n)  Pronunciation Key 
An early device for storing electric charge that uses the same principle as a modern capacitor. It consists of a glass jar with conductive metal foil covering its inner and outer surfaces, with the glass insulating these surfaces from each other. The inner surface is charged (by an external source) through an electrode penetrating the top of the jar; the inner and outer foil layers can then hold an equal and opposite charge.
The American Heritage® Science Dictionary
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