hairspring
noun
hair·spring
ˈher-ˌspriŋ 
: 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
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
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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
Cite this Entry
“Hairspring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hairspring. Accessed 17 Sep. 2025.
Copy CitationKids Definition
hairspring
noun
hair·spring
-ˌspriŋ
: a slender coiled spring that regulates the motion of the balance wheel in a timepiece
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