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 Many of his inventions, from hairsprings to automatic winding systems, were revolutionary and remain signatures of watchmaking to this day. The Editors, Robb Report, 28 Mar. 2024 Powering the complication is the automatic HMC 804 caliber, equipped with a double hairspring. Cait Bazemore, Robb Report, 24 Jan. 2024 One memorable display in the exhibition space features a grain of rice beside a minuscule screw from one of the brand’s in-house hairsprings. Victoria Gomelsky, Robb Report, 9 Oct. 2023 It is regulated by a silicon hairspring first introduced in 2008, along with an escapement treated with shock-resistant DIAMonSIL, was first applied to the Freak in 2007. Justin Fenner, Robb Report, 27 Mar. 2023 The movement is equipped with a double hairspring that reduces the effects of friction and an oscillating weight in 18-carat gold that is engraved with the watchmaker’s logo. Demetrius Simms, Robb Report, 16 Mar. 2023 The automatic HMC 804 caliber is equipped with a double hairspring designed and produced in-house by H. Moser & Cie.’s sister company Precision Engineering. Carol Besler, Robb Report, 30 Nov. 2022 Beneath the electric facade is the HMC 200 automatic movement featuring the brand’s in-house double hairspring. Paige Reddinger, Robb Report, 6 Nov. 2022 The watch is also the first edition to feature a double-hairspring tourbillion movement in a Streamliner case. Demetrius Simms, Robb Report, 23 Sep. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hairspring.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of hairspring was in 1830

Dictionary Entries Near hairspring

Cite this Entry

“Hairspring.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2024.

Kids Definition


hair·​spring -ˌspriŋ How to pronounce hairspring (audio)
: a slender coiled spring that regulates the motion of the balance wheel in a timepiece
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!