leyden jar

• POS: Noun Phrase
• HYPHEN: Ley=den jar

CIDE DICTIONARY

leyden jar, n. 

 A glass jar or bottle used to accumulate electricity. It is coated with tin foil, within and without, nearly to its top, and is surmounted by a brass knob which communicates with the inner coating, for the purpose of charging it with electricity. It is so named from having been invented in Leyden, Holland.  [1913 Webster]

OXFORD DICTIONARY

leyden jar, n. an early form of capacitor consisting of a glass jar with layers of metal foil on the outside and inside.

Etymology

Leyden (now Leiden) in Holland, where it was invented (1745)