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overcoil

American  
[oh-ver-koil] / ˈoʊ vərˌkɔɪl /

noun

Horology.

  1. 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.

  2. a hairspring having such a fixed end.

Etymology

Origin of overcoil

First recorded in 1880–85; over- + coil 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.