hairspring

noun

hair·​spring ˈher-ˌspriŋ How to pronounce hairspring (audio)
: a slender spiraled recoil spring that regulates the motion of the balance wheel of a timepiece

Examples of hairspring in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
These movements follow the embrace and development of new technologies by Forestier-Kasapi and her team, foremost of which are carbon nanotube hairsprings to combat magnetism. Oren Hartov, Robb Report, 15 Aug. 2025 Because of Ulysse Nardin’s silicon technology also incorporated in the hairspring and the escapement-wheel, the anchor pivot and the jewels of the usual escapement are unnecessary. Anthony Demarco, Forbes.com, 24 July 2025 The heart of this watch is the one-minute flying tourbillon fitted with a cylindrical hairspring positioned at 6 o’clock, which showcases the expertise of H. Moser & Cie.’s sister company, Precision Engineering AG. Melinda Sheckells, The Hollywood Reporter, 16 Aug. 2024

Word History

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of hairspring was in 1830

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Cite this Entry

“Hairspring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hairspring. Accessed 10 Sep. 2025.

Kids Definition

hairspring

noun
hair·​spring -ˌspriŋ How to pronounce hairspring (audio)
: a slender coiled spring that regulates the motion of the balance wheel in a timepiece
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