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overcoil
[ oh-ver-koil ]
noun
, Horology.
- a fixed end of a spiral hairspring, consisting of an upwardly and inwardly bent continuation of the outermost coil of the spring: used to offset the asymmetry of the common spiral spring when tight, which impairs isochronism.
- a hairspring having such a fixed end.
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Example Sentences
Used in chronometers and other fine time pieces where the spring is an overcoil.
From Project Gutenberg
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