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Leyden jar

noun, Electricity
1.
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 of Leyden jar
1815-1825
1815-25; so called because invented in Leyden
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for Leyden jar

Leyden jar

noun
1.
(physics) an early type of capacitor consisting of a glass jar with the lower part of the inside and outside coated with tin foil
Word Origin
C18: first made in Leiden
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
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Word Origin and History for Leyden jar
n.

1755, phial used for accumulating and storing static electricity, from Leyden (modern Leiden), city in Holland; so called because it was first described (in 1746) by physicist Pieter van Musschenbroek of Leyden (1692-1761). The place name is said to be from Germanic *leitha- "canal."

Online Etymology Dictionary, © 2010 Douglas Harper
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Leyden jar in Science
Leyden jar
  (līd'n)   
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
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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